Originally Posted by
Elvo
Generally the ones that can fit 700x45 can also fit 650x48 but it depends on the chain stay and fork width.
I'll let you know what the max tire I can fit on 650b's once my sample comes in. sounds like you're adding 3mm, so i'm guessing 45's. But I don't want to cut it too close to allow for wheel out of true tolerance etc. Nice to have a good gap there just in case you're out riding and things go wrong that you can't fix trail-side.