Monday, November 9, 2009

Stuart's completed S-Works Roubaix 7900

Photos: Chris Ware - Click for large version

Sorry it took me a while to get these posted. It's been a crazy couple of weeks.

The bike was finished before I took off to SBCU - and this is how it looked moments after completion. Here's the details of the build kit:

-Frameset: 2010 Specialized S-Works Roubaix SL2 & S-Works Pave' seatpost
-Wheelset: Shimano Dura Ace 7850-c24-cl
-Tires: Continental Gran Prix 4000s
-Group: Shimano Dura Ace 7900 (w/ Ultegra 6700 STI & f. derailleur)
-Handlebar: Ritchey SuperLogic Carbon
-Bar Tape: Specialized Roubaix EVA
-Stem: S-Works Pro-Set
-Saddle: Selle Italia Max Flite Gel Flow

Now, as promised: I mentioned in my first post about the bike - and I've clearly outlined above - that we chose to mix Shimano's new Ultegra 6700 STI brake/shift levers and front derailleur into the Dura Ace 7900 groupset and that I had a good reason for it. Well, here's the deal: while I'm a huge Shimano fan, I've been a fairly vocal critic of their decision to reduce the number of rear shift detents on the 7900 shifters from three to two in favor of a shorter shifter "throw" (or range of travel required to complete a shift). Shimano maintains that the shorter throw enables a rider to shift four cogs with two cycles of the lever as fast if not faster than a rider could shift three with the single shifter cycle on previous generations. That's difficult to test for sure - but the lever throw difference is noticeable to discerning riders. While discussing the build options with Stuart; we determined that it would be nice to have three shift detents for the rear mechanism. And, since Stuart values function over the cohesive appearance of everything in the group being badged "Dura Ace", we subbed in the 6700 shifters.

The front derailleur is a direct result of that substitution. The 7900 front shift mechanism is designed to work with the unique cable pull of the 7900 shifter which allows it the shorter lever throw. This then dictates that the 7900 f. der. is not compatible with the 6700 shifters. Therefore we sub in the 6700 front derailleur for perfect functionality. Stuart is quite pleased with the results and I would say that in my short test ride - I don't think that I would be able to immediately pick out the STI's as 6700 if it weren't for the three shift detents on the right shifter. I think this speaks well of new Ultegra's performance.

Details and promises out of the way - enjoy the rest of the photos. Thanks to Chris for sharing them!

Thanks for reading!

No comments:

Post a Comment


All content - except where otherwise noted - copyright 2006 - 2013 Matthew Magee. Do not use without permission.

Google Analytics