My Fuji Touring came with 700x30 slicks and I have done a couple of trips with them and think they are fantastic for touring, yes, even on dirt roads. Lately I have been commuting on 700x28 tires by rationalising that the lighter load I carrry when commuting can be handled by a smaller and higher pressure tire with less rolling resistance. So far so good. So, if this is working for me, why are "touring" tires so darn wide and covered in treads? Am I just lucky that my tires haven't gone flat and my rims buckled, or is it just tradition to use a a wider treaded tire? Thoughts? Experiences?