I need bigger tires for my Chaparral. I put on my Hookworms for an urban ride and noticed they only clear in the back by a 1/4". I know the Hookworms are wacky tires, but larger knobby tires might not fit. I have Minion 2.35's on right now, which is good for trail riding and stuff, but I need a larger tire for downhill. What size tires are you running on your Chaparrals?