Mountain Bike Action

Boost 148: Boost 148 is a spacing standard for rear axles that extends the axle to 148 millimeters wide and allows engineers to push the rear wheel closer to the frame. Boost axles are also claimed to be much stiffer.

Boost 110: To go along with the Boost 148 rear spacing, the front axle spacing is widened to 110 millimeters. The benefits are similar to those of the new rear axle standard.

Brake modulation: A brake with more modulation has power that comes on slowly, as opposed to the on/off feeling some brakes have. More modulation is desirable to a point, but brakes with too much modulation can feel spongy and not as powerful.

Camber: Camber refers to the angle or pitch of a trail. An off-camber turn is one where the angle of the turn slopes down to the outside of the turn. An on-camber turn is the opposite, like one with a berm.

Casing: This comes from motorcycle terminology, when a rider would come up short on a jump and hit the motor case on the landing on a jump. It applies to mountain biking when a rider comes up short and has a rough impact.

Chair: A comfortable, well broken-in saddle, like an easy chair for your bike.

Chorizo (ed): Certain terms have varying usage depending on geography. This term is often heard in Northern California in reference to a rider crashing hard. In order for a rider to have properly “chorizoed,” at least one bruise that is a minimum of 3 inches across must be a resulting injury.

Chorizo wagon: This phrase refers to a pileup or crash of at least three consecutive riders. A true chorizo wagon will only occur when said wagon train of riders is pursuing a downhill STRAVA segment.