Avid 142088 BB5 MTB Disc Brakes 160mm

The Avid BB5 MTB Disc Brake is a cable-actuated mechanical disc brake system designed for mountain bikers who want dependable stopping power with simple maintenance. The mono-block caliper is machined from aluminum for durability on rough trails and uses a ball bearing cam mechanism to translate cable pull into smooth, progressive braking force. Paired with the included 160mm G2 Clean Sweep rotor — which features a six-bolt mounting design with a 44mm bolt circle diameter — the system delivers consistent heat dissipation and braking performance across varying weather and trail conditions.

Setup and ongoing maintenance are where the BB5 distinguishes itself among mechanical disc brakes. The Tri-Align Caliper Positioning System uses three adjustment points to precisely center the caliper over the rotor, minimizing pad rub and ensuring drag-free wheel spin. As pads wear, the outboard pad adjustment knob lets riders compensate without tools, and the adjustable spring tension allows fine-tuning of how quickly the pads retract after braking. The caliper uses a post-mount design with 74mm bolt spacing and ships with an IS 51mm mounting adaptor, making it compatible with most mountain bike frames. At 335g with steel-backed organic pads, it is a straightforward upgrade or replacement for riders looking for a complete, ready-to-install disc brake package.