If it fits, don't worry. I have 0" clearance on my '77 Motobecane (of course, it's a road bike...), and I was fitted to it in the shop. As long as you can straddle it, you're OK (rules different for a mountain bike, though...). I think that with today's bikes, they stress that you buy the smallest size frame that fits, because they flex less, so maybe you'd have a stiffer frame if it was smaller.
Last edited by Blue Order; 02-10-06 at 11:47 PM.