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Stopping is going to be an issue
People have adapted 26" frames to 700C, 650B is less of a stretch. Still going to need the brake posts moved, but Bettini hasn't said whether he owns a brazing torch 🙂
gbj_tester-
Ha, I wouldn't trust myself... I was looking to use the adjustable V-brakes (like the ones Paul do) to accommodate the 650b.
It's an early 90s MTB frame which I'm (over sentimentally) updating/resurrecting. I can't find many MTB specific 130mm rim brake hubs, but there's a few options for road.
Am I asking for catastrophe if I use road hubs (I'll not be doing anything more than a bit of gravel on it)?
Or should I just get some disc hubs laced to rim-brake rims?
Stopping is going to be an issue then if it's rim brake.