The rear-wheel drive design on the Troy-Bilt®TB310C helps power the mower over rugged terrain with a variable speed transmission designed with dual-lever controls. The Troy-Bilt® engine is designed for simple, no prime, no choke starting and the large 2.3-bushel rear bag helps minimize the time spent emptying the grass clippings. Quickly adjust the cutting height from 1.25"-3.75" with the dual-lever height adjusters, conveniently located near the wheels.