Hayes Dominion A4 Replacement Disc Brake Caliper - 4-Piston Pads Sold Separately BLK MFPN=00.4318.020.021 Specifically designed for use with

Specifically designed for use with Shimano 12-speed drivetrains and 12-speed Hyperglide+ chains

Perfect for any road or trailside repair

Remove pins to make it easier to reposition your foot or leave the full compliment of 20 for maximum grip over rough terrain

This is a faster version of Super Extra Blue with all of the kick

Hayes Dominion A4 Replacement Disc Brake Caliper - 4-Piston Pads Sold Separately BLK MFPN=00.4318.020.021 Specifically designed for use withReplacement disc brake calipers for Hayes Dominion hydraulic brake systems. Replacement caliper only (does not include brake hose or pads) Model Dominion A4 Description 4 Piston Caliper Mount 74mm Color Black