Hey folks: Getting ready for a fully loaded tour in some rough terrain. There's going to be a lot of steep fire roads. I currently ride Schwalbe Marathon Plus 700X32 for everyday commuting. Since many have advised me to look into wider tires I am wondering how wide can I go. I was looking at Michelin transworld sprint. They come in 700X35 or 700X40. I know the 35s will fit(with fenders) but what about the 40's??
Here are the tires
http://www.biketiresdirect.com/pmits...nt_tire/pp.htm

Thanks, Charlie