Shimano Ultegra BR-R8170 Hydraulic Disc Brake Caliper MAAP This kit is designed for

This kit is designed for use on bikes with a 1x drivetrain with a rear derailleur or internally geared hub

the RD-R9250 delivers incredibly quiet operation

For weight-obsessed roadies

reducing drag

Shimano Ultegra BR-R8170 Hydraulic Disc Brake Caliper MAAP This kit is designed forAll around improved, the Shimano Ultegra BR R8170 Hydraulic Disc Brake Caliper offers optimised dosing, quieter braking performance and extremely simplified maintenance. A faster gripping initial braking force always gives the feeling of full control, while a 10% increase in brake pad spacing allows for a significant reduction in noise during braking, despite a flatter overall construction. When paired with the RT MT900 brake disc rotor (sold