Classic & Vintage - Grand Bois Hetres- real world dimensions?
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06-23-11, 07:34 AM
Hi there. I'm toying with turning one of my old tourers into a 650b, and the fit may be close depending on the tires I choose. Anyone have Grand Bois Hetres in use? I'm wondering what the actual measurements are when pumped to appropriate psi- both width and the overall diameter it creates on the wheel. If anyone can fill me in, that would be great. Thanks!
06-23-11, 07:43 AM
There have been several production runs of the Hetre, with stated widths being either 41 or 42mm, depending on the lot. I think the newer ones are labeled as 42mm, and the ones I purchased this winter are labeled 42mm. They measure 41.0mm wide on Velocity Synergy rims. That's after about 200 miles of use and with a psi of about 35-40lb. I don't know the height measurement from rim to tip of tread-- that would be harder to measure.
06-23-11, 07:49 AM
Always a good idea to measure and make sure you have PLENTY of extra clearance (ya never know when you'll want to add fenders)
here is a good list of measurements to keep in mind
Also, there is a 650B listserv at GoogleGroups
lots of very helpful folks there
06-23-11, 07:54 AM
Thanks for the quick response, southpawboston! You're right, "height" was not the best way to approach what I really need to know, which is the overall diameter with those tires (close to 700c?). I've edited my original post.
06-23-11, 07:55 AM
"Also, there is a 650B listserv at GoogleGroups
lots of very helpful folks there"
I didn't know about that one- thanks!
06-23-11, 09:42 AM
I asked this same question not long ago and was told they measure around 43mm wide on 18mm rims.
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