Originally Posted by Jason222
I've got a friend with a really narrow front wheel, and he runs a 2.5 on it. Works fine.
The rim doesn't matter as much as whether or not your frame is large enough to take the tire. My frame won't take anything larger than 2.5 in the rear, but most XC bikes won't take larger than 2.35 .
Good point. I'll get out the old tape measure as soon as I get home. Unfortunately, Norco does not spec out the geometry on this particular bike anywhere (2005 Norco Moment in case anyone's interested). Geometry by Ryan Leech.
Will also need to take into consideration my rear brake - will be mounting a hydraulic rim brake, not a disk which will affect how wide my tires can go.