Product Description Optimized for cross-country and trail riding, the Hayes Dominion A2 disc brake caliper will give you the braking power you need for every spin on the trails. Hayes Dominion A2 Disc Brake Caliper Black at REI.com Browse all REI.com deals $120.00 In Stock at REI.com Price verified today Buy Now at REI.com Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Hayes Color Black Size NONE MPN BR1644 Hayes