Tire Size Question / Clincher

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09-07-09 | 12:27 PM

OldRoadman

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From: Menomonee Falls, Wi.

Bikes: 82 Trek 613 Sport Touring, 84 Lotus Classique

Tire Size Question / Clincher

Hi;

Just bought a bike with mid 80's UKAI clincher rims. The marking on the rim is "700 x 25C".
Does this mean the rim is limited to a max. size of 25C (25mm) width. I would like to order some new 28C tires but am not sure if I am limited to this 25C size.

Thanks, Bill

09-07-09 | 01:28 PM

T-Mar

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28C tires work well with rims that have 14-20mm between the inside edges of the flanges. The only 1980's era Ukai rim I'm aware of that exceeds this is the 20A. It is only 13mm.

09-07-09 | 03:19 PM

wrk101

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From: Mans of NC & SW UT Desert

Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more

Sheldon Brown site has an excellent guide to tire width limits.

09-07-09 | 05:20 PM

RobbieTunes

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And it will ride very nice with about 80-90 psi in those tires.
I'd love to have a set of rims like that for a mixte build. Those centerpull brakes don't do narrow rims all that well.