2x11v Di2 Shimano Rd-Rx815 gearbox

Shimano RD-RX815 2x11-speed Di2 rear derailleur Equipped with an integrated chain stabilizer, the Shimano GRX front derailleur ensures quieter pedaling and offers safety and precision shifting on mixed terrain. Great for racing on smooth surfaces, the front derailleur features an ON / OFF switch for the chain tensioner. The RD-RX815 DI2 version offers the digital precision of Shimano electronic shifting and synchro shifting and is compatible with road cassettes with 34T minimum sprocket. Silent and uninterrupted rear shifting on rough terrain Adjustable chain stabilizer prevents chain bumps and falls Shimano SHADOW RD + Smooth and reliable mixed-surface shifting Stabilizer ON / OFF according to terrain Clutch tension adjusted to gravel Compatible with the current road DUAL CONTROL LEVER Maximum front difference: 17T Top sprocket: Max. 11T / Min. 11D Lower sprocket: Max.34T / Min. 30D Total capacity: 38D