Tektro R559 brake calipers have an extra long reach of 53-73mm and work well with 700c bikes with larger tires.Features:Recessed nut mountDual pivot caliper brakeAdjustable cartridge padsForged aluminum constructionQuick release allows clearance for wide tiresConvert 27" wheel road frames for use with 700c wheelsSpecs:Type: Rear Caliper - Side PullMounting: Recessed NutReach: 53-73mmMaterial: Forged Aluminum armsPads: P422 Cartridge Pads - Adjustable angleWeight: 179 grams