CST Ouster Tires. The Ouster is an excellent choice for tackling technical terrain. The tall, open center tread keeps the mud on the ground and off your tires, and grips roots and rocks while climbing. The aggressive side knobs give you the confidence to rail away.

• CST Ouster Tires. The Ouster is an excellent choice for tackling technical terrain. The tall, open center tread keeps the mud on the ground and off your tires, and grips roots and rocks while climbing. The aggressive side knobs give you the confidence to rail away.