• At what point the inner width is too much? 23mm is what my gravel bike gets, I'd be afraid of damaging the sidewalls on a 25c tire. Maybe there's finally a reason for tubeless road.

  • At what point the inner width is too much?

    You're in experimental, but probably not yet dangerous, territory when the inner rim width exceeds about 75% of the true (not nominal) tyre width. You can get away with more at the back than at the front, because the front leans more.

  • So I'm risking it riding some 23s I had spare on my 19mm inner training wheelset. I'll have a good look next time I use these

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