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I have a mountain bike with a tyre marked 26x2.00 and I'd like to fit a training tyre so I can use my bike inside.

I know that the 26 refers to the diameter of the wheel and the 2.00 is the width of the tyre but I have my eye on a training tyre which is marked 26x1.25. Clearly the tyre width is smaller which is not a problem but what I don't understand is how I know whether it will fit my wheel rim.

Firstly, I don't know the correct place to measure the rim (it measures 26mm on the outside) but secondly how do I know which tyres will fit which rims? Is this listed on the tyre somewhere to say it fits a specific width wheel?

Thanks

Weiwen Ng
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cosmarchy
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  • The main requirement for a "training tire" is that it have a relatively smooth tread. Re the tire width, there's no hard and fast rule (so long as the width is in decimal -- don't ask), but 1.25 is probably a hair on the narrow side for a rim designed for a 2.00. – Daniel R Hicks May 02 '20 at 19:20
  • Thanks. What do you think a minimum I could get away with? I'm going to use it with my magnetic trainer but I want a thinner tyre to try and keep the noise to an absolute minimum... Thinking that smaller would have less contact hence less noise??? – cosmarchy May 02 '20 at 20:29
  • @ojs it most certainly does :). I'd like to download a copy of that catalog...is it available online? I've had a look around but J&Bs importers brings up a lot of irrelevant results!! – cosmarchy May 02 '20 at 20:44
  • The other option would be to get an extra rear wheel with a narrower 26'' rim to fit your narrower training tyre. But you'd need to check for the correct width between drop-outs. – Carel May 03 '20 at 11:47

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