Shimano dura ace 7900 road brake caliper setthe dura ace 7900 brakes present a new durable shoe compound that produces 210 the stopping power in wet condition 120 in dry conditions and 50 longer wear featurestop of the range dual pivot caliper brake with quick linear response increased rigidity and improved braking powerenhanced brake arch proportions give a quicker linear response and increased powermust be used in conjunction with st7900 sti or bltt79 aero levers for correct leverage