|Spindly brake calipers can't effectively stop a speeding bike. The Ultegra 6700 brakes not only have a rigid caliper to slow the wheel, but also a cam in the levers that provides mechanical advantage and modulation. With updated pad compounds, braking power is 20% better in dry and has doubled in wet conditions. By conserving energy expended in stopping and modulating, riders can go faster, longer. Enhanced brake arch proportion for quicker response, adjustable spring tension for fine-tuning feel and adjustable brake pad toe-in are some of the features. Lower profile barrel adjuster for better cable routing (especially on compact frames) and reduced cable friction. Short reach. Sold as a pair (front and rear) without cables. Compatible with ST-7970, ST-7900, BL-TT79, ST-6700 and ST-6703 levers only.