
Mountain biking includes traversing of rocks and washouts, and steep declines, on dirt trails, logging roads, and other unpaved environments — Life begins where the pavement ends. Your ride needs to be able to withstand the stresses of off-road use it's only bigger challenge is living up to your expitations.
Specialized - http://www.specialized.com
Devinci - http://devinci.com/bikes/
KHS - http://www.khsbicycles.com/