Touring - Trek 1000 '05 - suport knobby tires?

I am planing to beef up my '05 Trek 1000 tires in order to support a 300 mile ride on flat, crushed limestone terrain. What tires would work best for this? I am 230lbs/6'3". My rims are a stock Alexrims AT450. I was on this terrain this weekend with the default tires and they worked well. But I want to make sure if I hit some mud, the new tires can make it through. What are the 'knobbiest' tires I can use on this bike?

Hey man, where you headed? DC? Anyway, you could put some 25 or 28 tires with a little tread on that bike. I think you might end up destroying your wheels. I had an '05 1200 with the same rims that I destroyed. I'm about 6'3" 250. Get some tires with Kevlar belting. That will help reduce flats.

monkd

I'm a smaller Clydesdale than you at 6'0, 210 and I completely ruined that rear stock wheel. I replaced it with a Mavic Open Pro wheel and everything was good for several years after that.

Others on this list can advise about tires, but you really should consider investing in a stronger rear wheel!

Have a great ride.

Ken

I have a Trek 1000 with 700 x 25 tires. I also mainly ride my mountain bikes on unpaved gravel and dirt roads. I would hate to ride my 1000 on any 300 mile limestone trail. My only suggestion is to get the widest tires you can find for suspension. Don't worry about going knobby. I run semi-slicks on my mountain bikes and they work as good as anything in gravel.

Yep, I am heading to DC from Pittsburgh on rails to trails. I have the bike in the shop getting new Kevlar 30mm semi-knobbies and a tune up. I hope these work! The bike guy thought they would. The limestone on this trail is pretty mellow, well packed...i just hope the weight does not kill my rear rim....