genny1

Hia ll -- I'm a XC trail-riding newbie shopping tires. I ride mostly dry singletrack (includes roots, rock gardens, loose corners, small jumps, etc., but primarily dry hardpack), and also use my bike to commute to work.

I was lookin at reviews of the Maxxis Larsen TT tires, which seem appropriate for my dual trail-commuting needs. However, several of the reviewers say they put a Larsen on the back and something else (usually a bit wider, more knobby) on the front. Some say outright, with respect to trail use, "Do not use a Larsen on the front."

My newbie question is: what is it about the work the front tire does relative to the back tire that causes some to use different tires front and back?

Thanks much for any replies.