The avid bb7 road sl mechanic disc brake is a featherweight that packs a punch this race ready mechanical disc brake takes the proven power and performance of bb7 and dials it up a few notches with its sleek falcon grey anodizing and weight saving hardware the lightweight hs1 rotors and all titanium hardware saves 25 grams per wheel so youll be just as confident on the climbs as you are on the descents