Monday, June 23, 2008

Want a Clean Look, But Ride Too Many Hills for Fixie or Single Speed, Internal Hub Considerations

I receive phone calls from city cyclists who build up single speeds, and then realize after a couple of weeks that their commute contains too many hills for a one-geared bike. Most of these riders like the clean design of fixed gear and single-speed bikes, and they don't want to hang derailleurs off of their bike frames. So, the next logical question they ask is what about building up a rear wheel with an internal hub.



Most people were introduced to internal hubs on bikes such as the proverbial Raleigh three speed. You flick a switch or turn a grip, and all the gear changing takes place inside the hub where you can't see it and the mechanism is protected from the elements. These hubs employee planetary or epicycle gearing.



If you are considering an internal hub, right this second, read the late great Sheldon Brown's instructions on Bike Frame / Hub Spacing before we go on. Sheldon has written a clear lesson on figuring out hub spacing, cold setting, and he has included helpful photos. Also, read his article on Chainline Spacing, so you get a general idea about what is going on between the alignment of the front and the back of a bicycle drive train.



Now, given the number of internal hubs on the market, which one is going to work with your brakes and bike frame? Internal hubs are made in models that are compatible with either disc brakes, or coaster brakes (you use your feet to brake, like when you were a kid), or roller brakes, or V brakes. Shimano, for example, offers two models of their 8-speed Nexus hub: Model SG-8C20 has an integrated coaster brake; Nexus Model SG-8R25 is both V-brake and roller brake compatible. Also check the spacing specifications for each internal hub in which you are interested on the manufacturers' sites. Most manufacturers make 3-speed, 5-speed, and 8- or 9-speed internal hubs. Rohloff does a 14-speed hub. My suggestion is to try to find a hub that suits your current brake style, gearing comfort needs, and minimizes the amount of deforming you need to do to your frame in order to make the hub fit. If you are trekking across a continent, make sure to pick the hub that works with your adventure terrain. Strong suggestion: If you are thinking about an internal coaster hub for you city bike, and you ride like a wild cat, make sure to run a front brake also. You only need to skid through an intersection once to realize that coaster brakes are not made to stop late-for-work coffee-drinking adults riding at full tilt. (Been there, done that.)



Definitely check out this comparison of internal hubs by Marco at Hubstripping.com. You technical cats who love look at mechanisms and reading specs, click around on Marco's site until you get busted by your boss or co-worker for obsessing over gearing ranges and ratios while on the clock. Check out the manufacturer sites of the internal hubs Marco compares: Shimano, SRAM, Sturmey Archer, Rohloff, and Fichtel & Sachs. Wheelgirl bike shop recently built up some Nu Vinci hubs, which are heavy if you are riding a ton of hills, but useful for general, low-maintenance cycling. Marco has info on these hubs also. If we can build you wheel around your favorite internal hub, email us. We do build wheels for those living outside the Bay Area. The shipping is less than $20.00 to send a wheel set UPS ground.



Rohloffspeedhub Shimanonexus8sg8r25 Sramimotion9 Sturmeyarcher8rr8 Nuvinci



(Photos of internal hubs, left to right, Rohloff, Shimano, SRAM, Sturmey Archer, NuVinci. All photos lifted from respective manufacturers' sites.)



Friday, June 20, 2008

Game Over for BART Bike Thief, Score One for Business Woman Bike Commuter

Here is a great to-catch-a-bike-thief story. Customer Kiki walked out of the Berkeley Ashby BART station, and she was looking forward to riding her Dutch commuter bike home after a long day at work. The hot dog man, who has watched Customer Kiki lock up her bike and get on BART for years, yelled to her, "He just stole your bike! That guy steals bikes all the time!" and pointed to some guy across the street, who was walking away from the BART with Customer Kiki's bike and another bike.



Customer Kiki, in formal business attire, looked at the bike rack, and suddenly realizing her bike was, in fact, missing, started running after the guy, who was stealing it. While sprinting across the cross-walk, all the while dragging her rolling business laptop case, she spotted a police car, flagged down an officer, and the police officer arrested and hand-cuffed the guy.



When asked why he had taken the bike, the bike thief, an older guy, said, "The key was in the bike lock, and I didn't want anyone to steal it, so I was watching it for her." Yes, like many of us, in a rush to avoid missing the train, Customer Kiki had inadvertently left the key in the bike lock. But, as the police officer reminded the thief, key or no key, it is against the law to take something that doesn't belong to you. The officer reunited Customer Kiki with her beloved Dutch commuter bike and put the wicked bike stealing man in the black and white (with the other stolen bike) and took him down to the station. Game over for the BART bike thief. Score one for bike commuters everywhere.



Bartlogo Hotdogphoto Azoromadutchbike Handcuffs_2



Bike photo lifted from CleverCycle, the Portland, Oregon store where Customer Kiki originally purchased her Dutch commuter. Bart Logo lifted from BART website. Handcuffs lifted from web. Hot dog photo lifted from Chemistryland site.



Thursday, June 19, 2008

Bikes on Fillmore Street in San Francisco

This is why I love the Bay Area. I was in San Francisco waiting for a friend. It was a gorgeous summer day in June, and I had an hour to kill, so I deicided to go bike watching. I took a walk down Fillmore from 1pm to 2pm, from about Jackson to Bush. And per usual, I was not disappointed.



(FillmoreBikes images folder)





Wednesday, June 18, 2008

Wheelgirl 2008 T-Shirt Design Contest Winner Gets A Set of Phil Wood Track Hubs & More

Do you want to win a set of PhilWood 120mm Fixed/Free high-flange track hubs in the color of your choice shipped to your door anywhere on planet Earth?  Want to make some coin when any item with your design on it is sold in the Wheelgirl brick and mortar bike shop and on line at Wheelgirl.com? Enter and win the Wheelgirl 2008 T-Shirt Design Contest. Enter your great t-shirt design, and maybe your dear fixed gear or single-speed bike will be sporting some new Phils this summer. All of the contest details are here. The deadline for t-shirt design entries is August 1, 2008.   



Given the level of creativity in bike communities, and the continued growth of Wheelgirl.com, which is now read in 78 of the 192 countries and territories said to be on the Earth, we should get some truly amazing designs from all over the planet. If you are not into making art, make sure to forward this post to some one you know who has the graphic design talent and a true passion for all things bicycle to bring home the Phils.



Creative cats, make sure to read all of the submission guidelines before designing. If you work as a graphic designer all day behind a PC or Mac, maybe eat your lunch at your desk a few days this week, and design the Wheelgirl bike shop t-shirt you want to see worn by those who love to ride bikes.



Adforcontest2_3 Tshirtequalsphilhubs_3



Tuesday, June 17, 2008

Wheelgirl Store



  • Note: The FireFox browser can't see the PayPal store. So, you have to view it in Explorer or Safari. (PayPal is working on this. Sorry to the twenty-percent of loyal readers who browse with FireFox.)


  • The online store will get fatter. The photos are pretty tiny, but this storefront makes it super quick and easy to buy bike gear online. So, I am going with it for now.


  • We have way too much stuff to list, so stop by the brick and mortar bike shop. Or, feel free to email if you are looking for something specific. (I can special order just about anything you can bolt to a bike.)


  • If you need something shipped internationally: You have to pay up front; email me; and FAX me a few times, so I know you are not a wicked stealing child. But we can get you whatever you need if you are honest and patient.


  • Thanks for checking out the thin store. You can make a payment with any of the following:
    • American Express


    • Visa


    • Mastercard


    • Discover


    • Your Bank Account


    • Your PayPal Account


Saturday, June 14, 2008

Wheelgirl.com Bike Shop 2008 T-Shirt Design Contest

Adforcontest2_2



*Please read all sections. All of the information you need should be here on this page. If you are new to design contests, take a professional graphic designer to lunch and ask some questions.



What You Get If Your Win



  1. The winner of the Wheelgirl.com 2008 T-Shirt Design Contest  gets a set of 2008 Phil Wood fixed / free track hubs 120mm spaced in the color of your choice shipped to your door anywhere on the planet. Oh yes, my friends, we are not fooling around here.


  2. The winner gets a commission of $1.00 USD from every t-shirt that sells with the winning design on it, as long as the shop decides to manufacture, retail, and distribute the design in the brick and mortar store and on line at Wheelgirl.com. You also get .25 cents USD commission for any items, for example, coffee mugs, water bottles, etc. that are sold with your design on them. You get paid this commission twice a year Jan. 1st and July 1st. So, don't quit your day job. But if you are a t-shirt design genius, you should be able to buy yourself some sweet bike parts and pizza slices with your money.


  3. The winner gets two t-shirts in the sizes of your choice printed with your design.


What You Get If You Enter But Don't Win



  1. All those who enter the Wheelgirl.com 2008 T-Shirt Design Contest will have their design put on the site August 3, 2008 to live forever in an album of all designs submitted for the Wheelgirl.com 2008 T-Shirt Design Contest with your name and email (if you like). What does that do for you? Well, we track all of the traffic stats to the site. So, if your design gets a ton of legitimate hits, we may contact you for future design projects. (Note: *We can tell if you and your cousin are sitting in your basement drinking cases of Red Bull clicking repeatedly on your design, so don't try anything sly.)


  2. You get to show your friends, family, prospective employers your designs in the context of a community of designers who love bikes.


  3. Adoring fans who completely dig your design style may contact you for other design projects. 


Deadlines



  1. We are accepting entries from June 16, 2008 until the deadline midnight August 1, 2008, Pacific Standard Time. This gives you plenty of time to work out a great design.


  2. Any entries received after the deadline are not qualified to enter the contest. We will pick and announce a winning design on August 3, 2008 and post this info. on the site. So there is no need to email and ask who has won. Watch the site, and August 3rd you will have your answer.


Submission Rules: General



  1. The Wheelgirl bike shop services, tunes up, and builds bike of all types for males and females of all ages, occupations, and abilities. So, the t-shirt design has to appeal to any cat who loves to ride any style of bike.


  2. The Wheelgirl bike shop logo has to appear at least once on a visible part of the t-shirt. Keep reading, and you will see where to download the logo. You can size, color, and augment the logo as you see fit.


  3. The text "Wheelgirl.com" has to appear at least once on a visible part of the t-shirt in any size font or as a visual design element in any size of your choosing.


  4. This design must be completely original. You can't use any trademarked logos (except the Wheelgirl logo) or graphics from other companies, or you will be talking with Perry Mason and Della. Keep it all as original as design can be in 2008. Different countries have different copyright laws. So, we can avoid all copyright issues if what you draw or create is 100% original. ("But what if you change 33% of a design?" You can still lose in court. All original. Be the star you are. Of you use a photo, make sure you are the one who took the photo, and there are no copyright /licensing issues.)


  5. You can submit one complete t-shirt design per person. This includes a design for the front of the t-shirt and a design for the back of the t-shirt. You can discretely sign your fabulous design in the bottom corner.


  6. The winning design will be printed in 1 color of ink on differently colored t-shirts. For example, we may print white ink on a black shirt, or dark blue ink on a orange shirt.


  7. By entering your design into this contest you agree to all of the Submission rules and give Wheelgirl.com the permission to print your design on the shop t-shirts, and on other items that are related to the shop, such as water bottles, mugs.  We will communicate with you via email, and most probably, you will be stoked to have your design associated with bikes and those who dig your work.


  8. You understand that we may need to alter your design only if changes are needed prior to printing; for example, the size of the design needs to be scaled for XSmall or XLarge t-shirts. You will be consulted about changes. You agree that Wheelgirl.com will publish your design on our website and in any other Wheelgirl.com related shop and web-based materials and may display it at Wheelgirl.com events, etc.  You also understand that you will not receive any royalties for the reproduction of your artwork, per se. (See "What You Get If You Win" for info. about coin.)


  9. Your entry must fulfill all aspects of the all submission rules in order to qualify for the contest.


Submission Rules: Technical



  1. You can make the Wheelgirl logo any color, size, pattern you want, but remember that it needs to appear at least once on the t-shirt. Download the PhotoShop file of a 300 dpi Wheelgirl Logo 


  2. You have two areas in which to design: The front and the back of a short-sleeved American Apparel t-shirt. The design on the front of the t-shirt must fit within a 10 x 10 inch area (25.4 cm x 25.4 cm) on the front of the shirt, and the design on the back of the shirt must fit within a 10 x 10 inch area (25.4 cm x 25.4 cm) on the back of the shirt. This means your design can be smaller than, but it cannot for any reason be bigger than 10 x 10 inches (25.4 cm x 25.4 cm)


  3. The winning design must be available as an Adobe Illustrator file or PhotoShop file set at 300 dpi in CYMK suitable for use by a commercial silk-screen printing company. So make sure you set up your file correctly before beginning to design. (If you are new to this, trade someone a slice of cake and a cup of tea to check and make sure you set up your file format correctly.)


Submission Rules: Entries



  1. Send your Wheelgirl.com T-Shirt Design Contest entry to this email ( service at wheelgirl dot com.)


  2. In the Subject Line of the email, type in "T-Shirt Design Contest, NameOfYourDesign, YourTown andCountryOrTerritory. For example, the subject line might say: "TShirt Contest, Tea with a Wheel and Dinosaur, Berkeley, USA"


  3. In the text of the email, enter your name, phone, mailing address, fax number. *You can't win if we cannot contact you. So you creative cats be mindful of making sure the contact email you give us is going to be in service and your mailbox limit is not completely full.


  4. Do not send us your fat Illustrator or PhotoShop files. We won't open them. We will contact you if we need your fat design files.


  5. Instead, save each fat design file (the front and the back designs) for the t-shirt as a JPG file that is not larger than 650x650 pixels at 72 dpi each. These files for all those who enter the contest are the ones we are going to put on the Wheelgirl.com website.


  6. Remember to attach both JPGs (the t-shirt front design and the t-shirt back design) to your email. (Copy yourself on the email, so you know that you sent both files.)


  7. If you win, we will contact you via email for the original high-resolution Illustrator or PhotoShop files suitable for silk-screening t-shirts. So make sure to back up your original file. We don't want anything to happen to those golden files.


Example of Current Wheelgirl Bike Shop T-Shirt Design



Here are a few examples of the current t-shirt design. We also have red on black and black on brown. We want to offer bike riders who support the shop another t-shirt design that shouts hip and fresh. The current design shirt is a one-color design on an American Apparel t-shirt. In keeping with the rules, the logo appears on the shirt, as does the bike shop name. The t-shirt has a design on the front and the back. No one is suing for copyright infringement, and we sell a bunch of this design in different inks on different shirts to cats from all walks of life. Please do your best to make something that looks really different from this design. Let's see some international design genius. Take some time and create something that makes me grin with awe and respect, you crazy talented bike-loving cats who live on planet Earth.



Tshirtfrontkhaki Tshirtbackkhaki Tshirtfrontasphalt Tshirtbackasphalt Tshirtfrontblack Tshirtbackblack



Photos taken by Wheelgirl. Current Wheelgirl bike shop t-shirt modeled by Assistant Bike Mechanic, Jeff, who would rather be building a fixed gear, but was kind enough to change into a bunch of Wheelgirl t-shirts for these photos.



Wednesday, June 11, 2008

Campagnolo Moving to 11-Speed Cassette in 2009, Campy Please Include Espresso for Bike Mechanics

Bike Radar reports that Campagnolo is going to announce an 11-speed cassette for three of their 2009 gruppos. The 11 cogs in new 2009 Campy 11-speed group set cassette will fit into the existing space that currently accommodates 10 cogs. So, as pointed out in a Bike Radar article, the 2009 chains and chain rings may require spot-on drive train spacing in order to accommodate the narrower gaps between cogs. You bike mechanics better find some inner peace or a vat of coffee, since the shifting and derailleur adjustments for 11 in the back and two up front, coupled with the new 5.5 mm chain, may teach you something about yourself.  The 11-speed cassette is expected to be backward compatible with 8-, 9-, and 10-speed freehubs. ("He said on my death bed I would achieve total consciousness, so I've got that going for me, which nice.)



Tulliocampagnolo_2



(Tullio Campagnolo photo lifted from Bike Radar site.)



Chrome Dually Messenger Pack Because You Don't Cycle in Cut-Off Jeans Anymore and Most Man Purses Weigh A Ton Empty

If you don't want to over-dress your bike in accessories or you simply don't have braze-ons to put a rack and panniers on your bike, the Chrome Dually messenger pack, which we sell in the Wheelgirl online store, is a comfortable way to haul your gear while commuting on your bike. More importantly, the Dually makes my back and neck feel much better than the one-strap messenger-style bike bags. Now, you carefree cats who wear cut-off jeans while riding across America on a bike that is two sizes too big and still  go dancing at night until 4 am, heck, put forty pounds of groceries in the no-name messenger bag you found in the luggage bin at the Salvation Army for $2.00, and laugh aloud--for now. But, later my friends, if you become a day-time desk jockey, the Chrome Dually, which looks good and has great features, may save you from the eventual neck and back bonsai caused from sitting all day and then carrying the bulk of the cargo weight in your bag on one shoulder. Chrome calls it their small messenger pack, but it holds a ton of gear for the average bike commuter.



My favorite thing about the Dually is that it is light when it is empty. Yet, your cargo feels supported and stable on the bike when the Dually is filled to the brim with serious weight. The breathable back pad works well with the straps, and you can cinch it all down comfortably and keep the pack's weight really balanced and close to your body. You can haul tall and awkward items in the backpack, since you don't have to close the flap for your cargo to stay put. It is water-proof, so your electronic and paper cargo is safe when riding in the rain. There is a zipped compartment for your wallet, keys, money, phone. There are three inside pockets for quick access to daily items. You can abuse the Dually, and it lasts. Oh, and you can completely clean the inside waterproof floating liner if you spill Pad Thai and half-and half for your coffee during a combination dinner and grocery run.



(Jump for more photos and to read about my experience with my Dually; view a typical man purse dialog and Chrome's great guarantee; see why lady cycling cats might like the lighter Dually messenger pack, and test on your backpack cargo capacity with an item that everyone has in their home.)



Chromedually1 Chromedually2 Chromedually3 Chromedually4 Chromedually5 Chromedually6



Mydually3 Chromedually7_2



(Photos by Wheelgirl. The black-on-black Dually is often sold out. I can usually get any type of Chrome bag in any offered color combination. If you want to buy something not on the site, send an email.)



I've been happily beating the heck out of my Dually backpack for a couple of years, and it has been well worth the $120 for the knowledge that the stitching and straps of the Dually always makes it through the storm. Except for the reflective tape on the main strap, which I have managed partially to scrape off, it works as well as it did the day I got it. My keys get clipped to the D-ring on the strap, and I throw it on the cement floor of the shop and on my home's old wood floor every night. In addition, I cram it full of a scary and wrong amount of groceries weekly. Even though the yellow liner shows dirt more readily, I like having a lighter-colored liner, since stuff at the bottom of the pack stands out against the lighter color.


And Chrome does have your back, as they state on their website: "We will repair or replace, free of charge, any item that is found to be defective in materials or workmanship. If you screwed up and broke your bag as a result of your own action...we can still help. Give us a call and let us know what happened. If your story is sufficiently ridiculous you may qualify for a free repair." 


OK, for the skeptics, you do see Chrome messenger bags everywhere these days. The one-strap messenger bags with the seat belt buckle and the hip logo of the San Francisco company are cool, and who doesn't want to be cool? But all brands of messenger bags are getting a bit too over-determined to be extra cool, and more importantly, you may not be a two-wheeled asphalt stallion or thoroughbred mare of a messenger delivering fat Xerox boxes of documents through the city streets. You may actually sit at a desk for much of your work day to make your living, and if you do, you don't need a ginormous one-shoulder-strap-styled bike bag to haul around a laptop, some power cords, a cell phone, and some breath mints. The Dually's 1000 cubic inches are more than enough space to accommodate most urban cyclists' daily hauling and shopping needs.


For females, the comfort, proportions of the Dually, and the lighter bag weight translates into a much more pleasurable bike-bag-toting experience. Unless you are an Olympic female swimmer competing in Beijing this summer and possess world-class upper-body control and strength, the average slimmer-shouldered lady cat tends to feel the extra textile weight of a heavy bag much more than the typical male cyclists. Many of you tom cats already tote around a man purse that can weigh about 8-lbs "empty". We did a little survey at the bike shop a while back and weighed a bunch of the male customers' cycling bags. The experience went something like this:

"Empty your bag, then I'll weigh it."
"The inside is empty. I swear."
"Then why is it so heavy? What do you have in the front pockets?"
"Nothing, I just have my multi-tool, and a shirt, oh, and a jacket, and a tube, and some levers, and this really good book; have you read this? This guy is hilarious!  Oh, and there's my other pair of earphones for my iPod, and my girlfriend's digital camera. Hum...I thought I lost her camera; I am so stoked to have found this! She is going to be really happy, and this tire pump this guy gave me for free, and a blinky light, and my U lock, and a combination lock. I forgot the combination, but I know I will eventually remember it. And there are those batteries. I knew I had some extra ones kicking around, and a pen that is also a flashlight, and a toothbrush, and my wallet, and an extra set of cleats for my bike shoes."

If you do need serious cargo-carrying capacity, check out Chrome's other messenger packs: Ranchero at 1480 cubic inches and Backbone at 2400 cubic inches. Strong suggestion: If you are not a messenger making a living on two wheels, and you plan to commute by bike for many years, don't buy a pack that holds as much as a Samsonite suitcase. Messengers are pros at hauling cargo via bike. And no amount of exercise and organic food is going to fix a weekend warrior's or grad student's tweaked back and neck after hauling around way too much gear on a daily basis. Get a rack if you have to carry heavy cargo, and make your bike frame, not your body, do the work.


For those inquiring minds, to do this test, I picked an item that everyone has in their house, toilet paper rolls. The Dually holds 14 rolls loaded vertically. If I loaded the rolls with the long end horizontal, I could probably compress the rolls and fit even more. The point being that a thousand cubic inches is a good amount of cargo space.


Mydually2 Mydually4 Mydually3_3


Tuesday, June 3, 2008

2009 Dura Ace 7900 Cycling Group Set 135 Grams Lighter, Chain Has Reusable Quicklink Connection Pin

The 2009 7900 Series Dura Ace road racing group set made by Shimano is 135 grams (4.76 ounces) lighter than Dura Ace 7800 and provides more of a black and silver hi-tech look. Dura Ace 2009 (even though we are still in the year 2008) ups the ante on cycling component choice, performance, and value. The FC-7900 HollowTech crankset is 20 percent stiffer and has re-profiled teeth. The new crankset has hollow chain rings and is available in 53T/39T, 52T/39T, 52T/42T, 54T/42T, 55T/42T, and 56T/44T configurations. So, you are bound to find a chain ring combination that makes your body and need for speed happy. Not doing a ton of racing but want high-performance in a compact crankset? The Dura Ace 7900 Series offers a compact crankset (FC-7950) with 50T/34T chain rings. In addition, you shorter- and longer-legged beasts on two wheels, can order cranks lengths from 165mm to 180mm in 2.5mm increments.



Here are a few Dura Ace 7900 details. (Jump for more details): The ST-7900 Dura Ace Dual Control Levers have titanium fixing bolts. Shimano engineers have decreased the rear shift stroke by 20 percent for faster rear shifts, and they have shaved 40 grams of weight from each pair. The CS-7900 cassette, with an aluminum carrier and the four largest sprockets made of titanium, is offered in 11-21T, 11-23T, 11-25T, 11-27T, 11-28T, 12-23T, 12-25T, 12-27T. Again, you should be able to find the right cassette for your cycling preferences and geography. The RD-7900 rear derailleur has a carbon pulley plate. The FD-7900-B front derailleur has been redesigned to eliminate trim (having to click your shifter between the settings in certain gear ratios, so the chain doesn't rub). The BR-7900 brake calipers have a redesigned brake arch. The PD-7810 Pro-Tour Racing pedals, released a while ago, have an extra-wide platform. The FH-7900 rear hub (8-, 9-, and 10-speed compatible) has a titanium free hub body.



The 7900 series wheel sets are offered in six flavors. You may choose to race on a carbon 50mm high-profile tubular or clincher wheel set: WH-7850-C50-TU at 1467 gms, and WH-7850-C50-CL at 1580 gms. Need something less aero and lighter? Check out the 7900 series carbon tubular and tubeless wheel sets: WH-7850-C24-TU at 1257 gms and WH-7850-C24-TL at 1400 gms. Or you can opt for a even lighter carbon alloy composite clincher wheel set: WH-7850-C24-CL at 1380 gms or a Scandium road tubeless wheel set: WH7850-SL at 1514 gms.  (All weights given are for a pair of wheels.)



For many talented but disorganized cycling cats, your chain repair tool of choice is your cellphone, which you dial to get a ride home when your chain breaks. These cats, and those mileage monsters who have forgotten to re-stock the chain pin supply in their seat bags, may be quite happy about the CN-7900 Dura Ace Hyperglide 10-speed chain. In addition to having hollow pins and perforated chain plates, it can accept the new and reusable Quicklink connector. (Time will tell if it this is a good idea.) According to Shimano, you can use a new SM-CN79 Quicklink reusable connection link for tool-free chain removal and installation on the CN-7900 chain, and you can still use a 10-speed Hyperglide connecting pin to connect the chain.



I really like the smooth feeling of the 7800 Dura Ace road chains, so if you are riding a new Dura Ace CN-7900 chain with or without the Quicklink, please put up a post, and let us know if the redesigned chain feels markedly smoother. If you have first-hand experience fixing a busted Dura Ace 7900 chain without using tools leave a comment. Actually, if you are riding any of these new 7900 Dura Ace Series group set parts, put up a post and let us know how they compare to Dura Ace 7800.



(Jump for more 2009 Dura Ace 7900 Series road racing group set performance stats and specs and check out Shimano's Dura Ace website.)



Duraace7900roadgroupset Duraace7900crank Duraace7900brakecaliper Duraace7900rearderailleur Duraace7900wheelset Duraace7900pedal Duraace7900frontderailleur Duraace7900chain Duraace7900hubrear Duraace7900cassette Duraace7900dualcontrolshifter



(Photos lifted from the Shimano Dura Ace website.)



Here are more details about the Dura Ace 7900 Series road bike group set taken from the Shimano press release:


FC-7900 Dura-Ace  Hollowtech II  Crankset
Std or Compact


  • 20% stiffer than 7800 series crank

  • Hollowtech II hollow forged arms

  • Hollow chainring construction for added rigidity and light weigh

  • Re-profiled chainring teeth for more efficient chain contact and power transfer

  • Available in FC-7950 compact gearing (50/34)

  • Lengths available: 165 -180mm in 2.5mm increments

  • Ratios available: 53/39, 52/39, 52/42, 54/42, 55/42, 56/44

  • 15 grams lighter than 7800 series

  • Bottom bracket seals improved to reduce bearing contamination and seal friction

  • 725g (170mm) including bottom bracket

ST-7900 Dura Ace Dual Control Levers


  • Unidirectional carbon fiber lever blades reduce weight without loss of durability

  • Titanium clamp and fixing bolt

  • New perch shape is more comfortable over longer distances

  • Integrated reach adjuster provides a custom fit for even smaller hands

  • Redesign internal shifter mechanism allows for hidden cable routing without increased friction

  • Rear shift stroke reduced by 20% for faster rear shifts

  • Revised brake cable pivot location provides better braking modulation

  • 40 gram weight savings per pair over 7800 series

  • FlightDeck ready with wireless integration and built in buttons 378g

CN-7900 Dura Ace Hyperglide 10-speed Chain with new Quicklink


  • Asymmetrical design allows the inner and outer plates to be optimized for front and rear drive shifting performance

  • Outer plates designed to help reduce chain suck on the chainrings

  • Inner plates designed to enhance the interface with the cogset for efficient power transfer

  • Hollow pins for lighter weight

  • New link designs improve drivetrain smoothness and reduce noise

  • Uses new SM-CN79 quicklink reusable connection link for tool-free chain removal and installation

  • Can still use 10-speed Hyperglide connecting pin

  • 18 gram weight savings over 7800 series 252g