Shimano GRX Di2 ST-RX815 / BR-RX810

GRX Di2 ST-RX815 11 speed shifters/brake levers and flat mount BR-RX810 hydraulic calipers Anti-slip brake lever increases control on bumpy terrain Raised brake lever pivot point increases leverage from the hoods Adjustable free stroke and lever reach ServoWave action reduces freestroke and progressively increases brake leverage Compatible with 11 speed Di2 GRX and road derailleurs Forged aluminum BR-RX810 calipers Pre-assembled with SM-BH90-JK-SSR high power hose Includes L03A resin pads with improved wear resistance Attributes Fluid Mineral oil Brake Material Aluminum Caliper mount Flat mount Disc Diameter 140 or 160mm (not included) Lever Blade Material Aluminum Primary Color Black