How much clearance is needed between the rear tire and the chain stays? Tires wobble, frames and wheels flex under load, all sorts of things happen during the dynamics of riding that you never see when the bike is static or running in a straight line.

My current tire measures 29 mm wide and has about 1/8" (3 mm) clearance on each side (will measure in a minute).

I was thinking of an even wider tire in the rear (like a Compass Bon Jon or Barlow Pass) but want to ensure I don't go too wide.


Anyone used these tires? What was your experience?


Will they fit securely on an old MAVIC MA-2?