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

Example: Framebuilders:Richard Moon

Date: Tue, 11 Jan 2011 19:49:14 +0000
From: M-gineering <>
CC: classicrendezvous <>
References: <a0624085ec950ebcf6327@[]> <>
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