They usually feature suspension forks in front and sometimes have suspension in the rear. In both the front and rear, most XC bicycles have approximately 100 millimetres (10.0 cm; 3.9 in) of suspension travel, although some riders prefer 125 to 150 millimetres (12.5 to 15.0 cm; 4.9 to 5.9 in) of travel as bicycle frame strength and technology advance. The geometry of the frames generally places the rider in a little more upright position than on a road bicycle but much less than on a downhill bike.[citation needed]