Any question answered...

You are reading a single comment by @gbj_tester and its replies. Click here to read the full conversation.

•

branwen

If my bike is limited primarily by the brake bridge height at ~25c for a 700c wheel, would I be right in thinking that would be an equivalent radius as 44c on a 650b rim?

From Sheldon Brown; (622 mm [700c] + (25*2) -584 mm [650b] ) / 2 = 44

•

gbj_tester in reply to @branwen

To a first order approximation. There's a bit more to it than that, so don't commit to 44-584 if 25-622 is within 1mm of interference. You really need to account for rim width and tread band thickness to get a proper estimate.

•

branwen in reply to @gbj_tester

Ta. It looks like there aren't a lot of ~44c tyres anyway so I might just go down to 34c and eat the loss of clearance (running 165mm cranks so shouldn't be the end of the world).

Edit: for "a lot" read "within a reasonable budget for the build I'm considering"

About

Avatar for gbj_tester @gbj_tester started