I still want to see how much room I have left with 38c though.
Don't forget that a tyre will be wider when it's on a wider rim, so don't assume that you can get a 38 in there on a proper rim just because it goes in when fitted to a too-narrow one.
@gbj_tester started
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Don't forget that a tyre will be wider when it's on a wider rim, so don't assume that you can get a 38 in there on a proper rim just because it goes in when fitted to a too-narrow one.