Shimano GRX Di2 RD-RX815 2x11-speed rear derailleur

The SHIMANO GRX rear derailleur provides with its integrated chain stabilizer for quiet, safe and precise shifting on mixed terrain. For rides on smooth surfaces, the chain stabilizer can be switched off with the ON / OFF switch on the rear derailleur. The Di2 version of the RD-RX815 offers the digital precision of SHIMANO's electronic shifting combined with Synchronized Shifting and is compatible with road bike cassettes with max. 34Z at the largest sprocket.

Features:

• Compatible with current DUAL-CONTROL shift/brake lever for road bike.
• Max. Difference front: 17Z
• Small sprocket: Max. 11Z/Min. 11Z
• Large sprocket: Max. 34Z/Min. 30Z
• Total capacity: 38Z

Quiet and smooth shifting system for uneven terrain

• Adjustable chain stabilizer prevents the chain from jumping out
• Shimano Shadow RD+

Frictionless and reliable shifting in changing terrain conditions

• Depending on the terrain, the stabilizer can be switched on or off
• Spring tension adapted to gravel

Specifications:

• Model number: RD-RX815
• Group: GRX DI2
• Color: Standard color
• Rear shifters: 11
• Top-normal version|SHIMANO SHADOW RD+: ✔
• Axle mount|Direct mount (conventional): ✔
• Axle mount|Direct mount: ✔
• Max. front difference: 17Z
• Total capacity: 38Z
• Large pinion|Max.: 34Z
• Large pinion|Min.: 30Z
• Small pinion|Max.: 11Z
• Small pinion|Min.: 11Z
• Fluorine coated sprocket bushings: 4
• Roller|Bearing for shifting pulley: Sealed ball bearing
• Rollers|Bearings for tensioner pulley: Sealed ball bearing
• rollers|teeth: 13Z
• B-axis|Hollow axle: ✔
• Di2 connection wired|Di2 shifting: ✔
• Firmware update with E-TUBE PROJECT: ✔
• SD50 port (pcs): 1
• SD300 port (pcs): 0
• SD50 connector (pcs): 0
• SD300 connector (pcs): 0