Re: [CR] TA Pro 5 BIS Chain Ring Size and Tooth Count

In-Reply-To: <159817.51848.qm@web51102.mail.re2.yahoo.com>
References: <564322.28215.qm@web51103.mail.re2.yahoo.com>
From: "Fred Blasdel" <blasdelf@gmail.com>
Date: Wed, 30 Dec 2009 10:59:43 -0800
To: Classic Rendezvous <classicrendezvous@bikelist.org>
Subject: Re: [CR] TA Pro 5 BIS Chain Ring Size and Tooth Count

On Tue, Dec 29, 2009 at 6:50 PM, John Clay <jmedclay@yahoo.com> wrote:
>
> "Trials"? In the context of the time I wonder if it wasn't really analogous
> to motorcycle trials, but more in line with the Technical Trials which
> involved modest loads and difficult terrain.

No, it really is exactly like Motorcycle Trials -- trick riding with extremely low gears.

Trials bikes are typically built like a BMX with 24" or 26" wheels with very wide tires, a tiny front chainring, and a megarange cassette with a derailleur but a shortened chain. Hydraulic rim brakes from Magura were once common, but they seem to have mostly switched to discs for availability despite the loss of ground clearance.

A recent popular example: http://www.youtube.com/watch?v=Z19zFlPah-o

-- Fred Blasdel in Seattle