A wheelchair suspension includes a frame (142), a pivot arm (132), a front caster (106), and a drive assembly (136) and a drive assembly mounting bracket (308). The pivot arm is pivotally coupled to the frame (142). The front caster (106) is coupled to the pivot arm (132). Movement of the drive assembly mounting bracket (308) with respect to the frame (142) in a first direction causes the pivot arm (132) to remain in substantially a first position, and movement of the drive assembly mounting bracket with respect to the frame in a second direction urges the pivot arm away from the first position.
