Originally Posted by
mstraus
My impression was the numbers in those charts was the inner width of the rim, not outer. Is that not correct?
I am not clear what a 23mm outside width would translate to on inside width.
Yeah, the charts are talking about interior width, but that number isn't always listed in specs, especially with road rims. Mountain rim manufacturers seem to be a lot better about it, presumably because it matters more to MTB riders.
The inside width is typically about 3mm smaller than the exterior width, but that can vary.