Avid BB5 MTB Ball Bearing Bicycle Disc Brake (160mm, Black, Front or Rear) Brake Lever Actuation: Long Pull, Brake Usage F/R: Front,Rear, Brake Usage F/R: Rear,Front, Caliper Color: Satin Black Caliper Type: 74mm Post Mount, Caliper/Adapter: 74mm/51mm, Disc Mount Type: 51mm I.S. Front,51mm I.S. Rear Hub/Brake Compatibility: 6-Bolt Disc, Hydraulic Hose Length: Not Included Kit: front or rear, Rotor: 160mm, Rotor Size: 160mm, Weight: 335g