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MTB Rims

Old 05-01-10, 10:53 AM
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MTB Rims

I am going to start a FS cross country bike build. I have been looking at rims on ebay. I have seen width sizes from 23mm to 32 mm. What size for a cross counrty bike? Thanks, David
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Old 05-01-10, 11:23 AM
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Speaking in sweeping generalities, rims above 28mm width are usually used for freeride/downhill-ish applications (32, 36, etc.). I personally like a 25mm+ because it allows me to run a bit lower pressures without as much tendency to pinch-flat. I would just say go as wide as you can still staying within your target wheel-weight.
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Old 05-02-10, 03:19 PM
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I second that. If you have lots of rock gardens or risky items(or endo a lot ), go wider. Wider will also corner very positively. Narrow rims can feel a little 'wiggly' because the tire is less supported(not so much lacking rim rigidity).
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Old 05-02-10, 05:59 PM
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Agreed on going wider. I have narrow rims, but it was a budget build and I ride on narrower tires (2.0). If you want wider tires, pinch flat protection, and better cornering, go wider. The weight penalty is minimal.
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