hey matthew,
spocalc for excel has a really nice calculator plus extensive rim & hub
measurement database..
it's available for free downloadin here:
http://www.damonrinard.com/
it doesn't list the record du monde rim specifically, but the other super champion tubulars (medaille d'or, competition, arc-en-ciel) seem to be around 616mm erd.
alternatively, you can always take your own measurements.. two spokes threaded into nipples on opposite sides of the rim help to get an accurate diameter (measure from nipple to nipple and don't forget to add the total length of the nipple you are using x2)
andrei
On Dec 30, 2007 12:39 PM, devotion finesse <devotion_finesse@hotmail.com>
wrote:
>
> Most of the online spoke calculators I have found don't have much info in
> t
> heir databases for many "on-topic" rims.
> If, for example, you were attempting to build a wheelset with, say, Super
> C
> hampion Record Du Monde tubular rims, how would you precisely determine
> the
> E.R.D.? Or can you recommend a good database which has such info on
> "vint
> age" equipment?
>
> Matthew Bowne
> Brooklyn, New York