SRAM 40P Post Bracket Disc Brake Adapter Description: SRAM 40P Post Bracket Disc Brake Adapters provide an alternative mount that allows calipers to be used with rotors of a different size than those typically used on the frame or fork caliper mount. Features: Genuine replacement Brake post adapter for disc brake calipers For 140mm Post Mount applications Assists in the mounting of 200mm front rotors or 180mm rear rotors Specifications: Color: Black W/ Rainbow Bolts Brake mount type: Post Mount