Originally Posted by
Darth Lefty
OK. On my SS there was a ton of room above the tires, and the limit was the chain stays. I think you'd likely find the same on most recreational bikes with center pulls, because they have fender clearance. On my Paramount, it's at the bridges, but the chain stays don't give you enough more to put a much bigger tire in.
So, the moral of the story is check both
height and
width prior to converting!
Before doing a 650b conversion, I would highly recommend that you try putting on some wheels with your intended tire
first to see what issues you may come up with. 27" to 700c is a smaller jump, but the recommendation would be the same.