re: [CR]Unusual frame design on eBay - Caselli track bike

(Example: Production Builders:Teledyne)

From: "Christopher Harris" <chrisharris@bikerider.com>
To: <classicrendezvous@bikelist.org>
Date: Thu, 18 Dec 2008 09:48:08 +1000
Subject: re: [CR]Unusual frame design on eBay - Caselli track bike


The current seller sourced the bike from an Ebay vendor in Italy here:

http://ebay.com/<blah> me_W0QQitemZ110313139210QQcmdZViewItemQQptZRicambi_per_biciclette?hash=it em110313139210

I was recently talking to a framebuilder, about framebuilders who make mist akes. Let's say you're building a 56cm frame, and you miscount, and acciden tally cut the tube at 53cm. Well, tubing is too expensive to throw out, so you ge t creative. I'm guessing this frame was born out of something similar...

Chris Harris Sydney, NSW, Australia __________________ The frame design depicted increases the ability of the front end to track independently of the rear end, since it makes it easier for the axis of the steering apparatus to diverge from parallel with the seat tube. At the same time, it adds to the ability of the fork to absorb shock, by making it easier to twist around the "X" and momentarily shorten the wheelbase. I regard both attributes as "counterintuitive features," which might be marketer-speak for "really weird ways to make a track bike work less well." But, I could be wrong.

harvey sachs mcLean va.

Harry Travis asked: What understanding (or misunderstanding) of the forces on a bike would lead someone to build this frame? What problem does it solve? What weaknesses does it create? (I notice that with a smaller front wheel, more space has been furnished to the rider for her feet, and the headtube can be made longer.)

>> >> Never seen a frame like this: >> >> >> http://ebay.com/<blah> QQitemZ370131630317QQcmdZViewItemQQptZUK_sportsleisure_cycling_bikeparts_SR ?hash=item370131630317&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A1 0%7C39%3A1%7C240%3A1318 >> _______________________________________________

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