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who to convert rim width from metric to imperial

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Dark Diggler:
To add a size comparison, Greg Minnaar won last weeks World Cup series downhill race on 34mm width rims.

kalex:

--- Quote from: Dark Diggler on July 20, 2015, 07:11 AM ---

http://mombat.org/MOMBAT/BikeHistoryPages/Araya.html



It looks like they were all 32.2 wide, apart from the ones stamped 1.5 ( 7XN ) and obviously 1 3/8.

--- End quote ---

just to through a spanner in the works, I wonder if the cruiser wheel us different then. It could be because they are USA rims and measured differently. i'm not really sure but look at the description in this ebay link I found late last night. It states the rim is 26 x 2.125 but he gives the actual cross section width as 1.5" which is 38mm


http://m.ebay.com/itm/281749633723

Dark Diggler:
Really not sure on that one, I'm just going off what found, 38mm seems a bit wide though, especially for an 80's mountain bike wheel which what that ebay add is for (it won't fit a bmx without modifying the spacing and shortening the axle)
The downhill bike pictured is using 2.5 tyres with 34mm rims and you can see how big they look.

kalex:
Do you ever get that feeling you'd wished you never started and done something simple instead. as I'm starting to think that.

All I can guess is from what Sheldon brown says about simply converting tyre size from inches to mm doesn't actually work as it's because of the way it's measured or something, must also work on old USA stuff against more modern stuff.

think I'll stick to 20" bikes  :D

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