Avid bb7 road disc brakethe avid bb7 is a full adjustable twin cable actuated disc brake caliper. With easy adjust pad dials and designed specifically for road bike use the bb7 makes sure you always have solid braking performance.featurestri aligntrade caliper positioning systemtrade another original avid technology making your life bettermdashtheres never been an easier brake to install and adjust. With avids tri aligntradecaliper positioning systemtrade, aligning the caliper to the rotor literally takes seconds. Just loosen the cpstrade bolts a little, and then squeeze the brake lever while re tightening the bolts. Perfect caliper alignmentmdashjust like that.specificationsweight 329 grams 160mm rotor front post mountcaliper design mechanical, forged 2 piece aluminiumfinish platinumpad sinteredadjustment dual knob pad adjustment, tri align caliper positioningcompatibility road style leversmount is mount attached to post mount caliperrotor 6 bolt either 140mm or 160mm