Re: [CR]Light Speed and Retro Grouches

(Example: Framebuilders:Dario Pegoretti)

Date: Fri, 26 Jan 2001 08:42:40 +0000
Subject: Re: [CR]Light Speed and Retro Grouches
From: "Bob Reid" <bob.reid1@virgin.net>
To: <classicrendezvous@bikelist.org>
In-Reply-To: <3A713332.5F3D@earthlink.net>


Peugeot found absolutely no difficulty in going lite speed on the TdF a couple of years back.

p.s. Do Campag have the patents up to 13 millon teeth (and how thin is that chain going to be now)

Let's get back to poking the Bromide :-)

Bob Reid
>
> "Here I am trying to visualize the gear required to go light speed.
>
> First, I think even the most hard-headed retro-grouches will admit that
> an 11 cog is appropriate here. For a decent 120 rpm spin,
> and for a typical 2.1 meter rolling circumference :
>
> front chainring = (3x10^8 / 2.1) * 11 / 120 = 13 million teeth.
>
> The chainring will have a diameter, therefore, assuming a tooth pitch of
> 0.5 inches, of 53 kilometers."

>

> --Dan Connelly