Originally Posted by
easyupbug
We like to leave a 3mm gap between the tire and any spot on your frame or fork so you don't get rub under max acceleration or if the wheel get a slight wobble on a ride.
At 72 I don't do hard acceleration and I am careful with inspections so I go down to 2mm or so but watch the frame/fork carefully.
I checked and for the rear I can get up to a 28 in there with good flex clearance to spare. For the front, I feel like a 25 is about all I can muster while maintaining enough flex/rub room.