I think braking performance is the issue he specifically brought up. I assume it is in relation to narrow rims without resetting your brakes between switching wide and narrow profile rims on the same bike. Could that issue be resolved with resetting your brakes so they have the same distance to the rim than your previous setup? Or could it be related to the rim material/finish difference between your wide and narrow rims. Inquiring minds want to know.mperlberg said:@ DavidI'm riding Velocity A23s, 32-spokes ultegra hubs with 25mm maxis refuse winter tires.They are pretty great, but I can't tell if it is the wide rims, the wide tires, the lower PSI or combinations of the 3. not very scientific.Cornering is much easier. I feel like I'm sticking to the road while descending. The shock absorption is great.
@David, What brakes are you using ? I've used A23, Hed Belgium C2 and Zipp 101 with Shimano Ultegra (6600 and 6700 and DA 7900 and modulation and power is good, but not as good as with 19/20mm rims.
Campagnolo should be the same, but I have read reports that SRAM and some exotics (ZeroG, etc) have issues with the wider rims.
Even shimano acknowledge a need for improvement since the new 9000 series is designed for improved braking with wider rims.
The wider rims means you're not hitting flush with your preworn pads, you're only catching the lip. Re-toe!dstokes said:I'm using some very old Campy brakes. They still work ok. Just a tendency to chatter and grab. This may be due to worn brake pads hitting a different rim surface at a slightly different angle. Or maybe I need 21st century components.
Al (who I love and respect) does seem to have have preference for shorter reach. The first time he saw me on my bike (as fit by Mike Sherry) he suggested that I was way too stretched out. And he may (or may not) be on to something. As I'm sure you've discovered, each fitter seems to have their own preconceptions as to what the "correct" fit is (whether it is mathematically based, predicated on a piece of fit apparatus, a trust in their own instinct and/or experience, and/or a mixture of all of the above). And some are more dogmatic about that than others. So...if you find -- after riding with it for a bit -- that the micro rudder which Al has foist upon you is not right, feel free to question his notion. (Bear in mind however, per my forum ID picture, I have never let proper fit get in the way of my aesthetic goals.)
@ Rick
Makes sense.
I say way too early to tell. I saw it at Interbike and there are plenty of questions that only a long-term field test could answer. It's limited to those DA cranks. The head unit had some cool features. I have the press kit in my computer somewhere if anyone cares to see it.Jules said:
Come on, this is the Gear Thread... Care to see! Care to see! Care to see!mugwump said:I say way too early to tell. I saw it at Interbike and there are plenty of questions that only a long-term field test could answer. It's limited to those DA cranks. The head unit had some cool features. I have the press kit in my computer somewhere if anyone cares to see it.Jules said: