Spyre brake calipers utilize two piston movement for evenly applied rotor contact, resulting in optimum braking power and modulation. ?FEATURES: Ramped ball bearings offer smooth pad engagement and precise modulation Brake pad composite is Resin with Metal Fibers Resin with Metal Fibers pads are compatible with Resin-Only type rotors as well as standard rotors Intended for Road, Gravel and CX use Mounting hardware, rotors and adaptors sold separately Post Mount ?SPECS: Rotor Included: No Brake Lever Actuation: Short Pull Brake Caliper Type: Post Mount Weight: 146g