• If I were to put 25/28 latex tubes in a 38/42 tyre will I instantly die?

    I run 26" butyl tubes in 29er tyres, and that works fine.

  • No, but I'd imagine you'll go through tubes like nobody's business - I've used undersized butyl tubes (700c) as emergency fixes when I've had the wrong ones with me, and have had them tear. Latex is even more fragile, no?

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