Avid/ SRAM 40mm IS Disc Brake Adaptor Fits 200mm Front and 180mm Rear Rotors

SRAM/Avid Post Mount disc brake caliper mounting adaptors provide alternative mount positioning that allow the caliper to be used with different sized rotors than used on the frame or fork caliper mount.

Brake Caliper Type	Post Mount
Mount | Rotor Size	Rear IS | 180 Rotor