Shimano GRX ST-RX825 Di2 Shifter and BR-RX820 Caliper 12 Speed Size:Left Shifter / Rear Brake which provides more durability and

which provides more durability and keeps the weight low

Wider range capacity

Take all the work and harsh chemicals out of chain waxing

The 40mm deep carbon rims help keep overall weight at just 1249 grams

we recommend that you recalibrate after 5000 cycles

Shimano GRX ST-RX825 Di2 Shifter and BR-RX820 Caliper 12 Speed Size:Left Shifter / Rear Brake which provides more durability andThe Shimano GRX ST RX825 Di2 Shifter and BR RX820 Caliper (12 Speed) pairs wireless Di2 shifting with a dedicated hydraulic flat mount caliper, built for gravel, cyclocross and touring riders who need reliable stopping power and precise gear changes on mixed terrain. Specifications Series: GRX Di2 RX825 Application: Gravel, Cyclocross, City & Touring Gearing: 2x, 12 speed Shifting System: wireless Type: hydraulic Actuation: mineral oil Hose: SM BH90