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  • Inner tubes. On my cross bike I use 28mm tyres to commute and 32mm cross ones for riding around in dirt. Inner tubes generally say 18-25, 23- 28 or 28-42. Which are the best ones both my tyres? Will the 18-25's just stretch up to 32 without issue?

  • I'd go with the 28-42 as you're gonna be riding cross. Thinner tube is only gonna lead to more pinches right?

  • Will the 18-25's just stretch up to 32 without issue?

    I've always found the answer to this to be yes, but YMMV.

  • In my experience, you'll want different set of tubes for each pair of tyres, as the tube will stretch when using the larger tyres and be a massive pain to into a smaller tyre.

    I've never had an issue using 23/25mm tubes in cross tyres before, so the same size tube will be fine for both, as long as you have a separate set for each tyre pair.

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