Re: [CR] How to ID a rim: 650b vs 26"?


Example: Racing:Roger de Vlaeminck

From: Tom Harriman <transition202@hotmail.com>
To: <info@m-gineering.nl>
Date: Thu, 13 Jan 2011 04:03:15 +0000
In-Reply-To: <4D2CB43A.1090303@m-gineering.nl>
References: <a0624085ec950ebcf6327@[67.101.5.151]> <DA4961EE-3275-47AD-87A9-69C296222762@cox.net>
Cc: Classic Rendezvous <classicrendezvous@bikelist.org>
Subject: Re: [CR] How to ID a rim: 650b vs 26"?


Hi Eric. The quick and simple way to know the rim size is to try a tire on it. Find a 26" tire, easy because they are so common, and try mounting it to the rim. If the tire goes on it's a 26" rim, if it won't it's a 650. Simple as that. Tom HarrimanSan Francisco, Ca
> Date: Tue, 11 Jan 2011 19:49:14 +0000
> From: info@m-gineering.nl
> CC: classicrendezvous@bikelist.org
> Subject: Re: [CR] How to ID a rim: 650b vs 26"?
>
> On 1/11/2011 6:19 PM, Eric Elman wrote:
> > Hello List Friends,
> >
> > I have three NOS Mavic Mod E rims that have no size markings on them. Can anyone advise what/where to measure (please be very specific) and the dimensions I should look for for in order to determine if they are 650b or 26"? They are not 700c just based on size comparison to numerous other 700c rims I have in my stash.
> >
> > Thanks in advance,
> >
> > Eric Elman
> > Somers, CT USA
> >
>
> Start with ETRTO sizing which is logical
>
> beaddiameter for a 650B tyre is 584mm, 650C = 571mm, 26" MTB is 559mm.
> With an inch at 25.4mm, it shouldn't be to difficult to keep them apart
>
>
> --
> mvg
>
> Marten Gerritsen
> Kiel Windeweer
> Netherlands