Good value 57 mm drop front caliper brake Super SLR dual pivot design keeps operating friction to a minimum improving braking performance Must be used in conjunction with ST-4600 ST-4603 ST-5700 ST-5703 ST-6700 or ST-7900 STIsfor correct leverage ratio Enhanced brake arch proportions give a quicker linear response & increased power 57 mm drop Lightweight aluminium calliper design with tough anodised finish Toe-in adjustable brake shoes for perfect pad alignment Durable quick release for fast & easy wheel removal Comes with 10.5 / 12.5 / 18 / & 27 mm sunken nut