The BB5 offers Avids Tri-Align Calliper Positioning System, tool-free pad replacement, a melt-forged body and an inboard pad adjustment knob. Perfect as an upgrade from block brakes. Great performance at an entry level price. Mono-Blok caliper. Pad adjustment via the barrel adjuster. Spring Tension Adjustment. Easy Cable Anchor Bolt. G2CS rotor. Compatible with all Avid Levers,. Weight: 335g. Can be used as front or rear brake. Requires: Brake cable and brake lever.