[CR]Frame flex

(Example: Framebuilding:Tubing)

From: Tom Sanders <tsan7759142@comcast.net>
To: "Classicrendezvous@Bikelist.Org" <classicrendezvous@bikelist.org>
Date: Thu, 29 Sep 2005 08:46:27 -0400
Thread-Index: AcXE886UE02gfoa/TceSVAOT9WVQMw==
Subject: [CR]Frame flex

I have been reading the recent discussion of frame flex with some interest. Especially the discussion of Damon Rinard's deflection tests http://sheldonbrown.com/rinard/rinard_frametest.html . I own the Joe Starck Masi 3 V that was used in these tests and that tied for the most rigid stays of all the steel bikes tested. http://www.wooljersey.com/gallery/Tom-Sanders-Pictures I am kind of glad it is as stiff as it is...there is no trace of flex under my riding and I can't see that the ride has suffered in any way. I think the tires and wheels are such a huge variable that one might be hard put to offer much but intuition as to differences in ride quality related to such stiffness.
   I can say that I haven't much use for any bike that autoshifts when the rider is powering up hills out of the saddle. This has been known to happen with very flexey bikes. I have a very knowledgeable friend who constantly warns me not to do this on my Paramount, however, and I can say it has never happened to me. Perhaps more due to lack of power than to any great rigidity of the bike itself. Years ago I did own a Miyata where this was a problem. Perhaps there was more power available back then :^). When Jan mentions "Then all of us on the flexey, thin-gauge Masis, Colnagos, Cinellis and Paramounts will be left in the dust!" when presented with a modern super stiff, super light bike, I am sure he has tongue planted firmly in Cheek. At any rate, I cordially invite any and all of you to take the 3V out for a spin next time you are over to the house or next time you see me with it. To me it feels just like all the other 3Vs I have owned, both Italian and American. Joe has told me in the past that I'd never get it to flex, and he was pretty proud of his stay treatment on it. Tom Sanders Lansing, Mi