Shimano, Ultegra Di2 ST-R8170 / BR-R8170, Road Hydraulic Disc Brake, Rear, Flat mount, 140 or 160mm (not included), Black, IR8170DRRDSC170A

Description

The ULTEGRA ST-R8170 2x12 speed Dual Control levers with Wireless Di2 connectivity deliver a clean aesthetic and simple setup while reimagined ergonomics bring a new level of comfort and control.* 2x12-speed Dual-Control lever with 4.6mm longer reach for increased security and control* Refined hood for improved ergonomics and aerodynamics with improved button access* SERVO WAVE technology enhances brake performance thanks to a faster initial bite point followed by a wider control area.* Easy fit pre-bled J-Kit* 1000mm SM-BH90 front hose or 1700mm SM-BH90 rear hose includedULTEGRA BR-R8170 hydraulic calipers are the most compact yet. Mono-body construction ensures light weight and rigidity, proving that good things can come in small packages.* One-piece structure maximizes stiffness and reduces weight* Maintenance-friendly ONE WAY bleeding process* 10% wider pad clearance decreases the chance of rotor rub