One needs to not only mount the specific tires to visually see, but also remember, a little extra space is needed to prevent tire rub on the stays fork for when accelerating and turning aggressively. I put 35mm GK semi-slick on my Poprad and the clearance was a shade under 3mm on each side of the chain stays. It was fine my first few rides. Then I went for a faster, more aggressive ride and the tires rubbed on those stays. The seat stays and fork had plenty of room, but the tires came off due to the chain stays. I now have the GK's in 32mm, if I did not already know better, I would swear there was enough room for the 35's.