My mountain bike has 26 x 2.125 tires on it and I am ordering new 26 x 1.95 tires.

Will these be okay to use? What issue might this cause? Or will the difference be negligible?

  • it's fine. 0.13 inches is hardly anything. – Paul H Jun 26 '19 at 18:47
  • If old and new are of different makes you might end up with tyres of approximately the same width. Or even the new ones being larger than the old ones. Sizing isn't an exact science. Each company has it's own ways. – Carel Jun 26 '19 at 18:54
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    @PaulH answers should be answers please - comments are for clarifying the question or answer they are below. – Criggie Jun 27 '19 at 3:37

Yes - you can fit 26x1.95 tires to replace 26x 2.125. They will be slightly narrower, and that might mean you need to pump them up slightly harder. If the tread was the same pattern, they would probably offer slightly less grip on a loose and rough surface, though it is likely that the new rubber will be much more grippy than your old tyre is.

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