Shimano GRX RD-RX815 DI2 Rear Derailleur 11-speed (34T max low sprocket)Shimano GRX RD RX815 DI2 Rear Derailleur 11 speed (34T max low sprocket) With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON OFF switch for the chain tensioner. The RD RX815 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. and is

1pcs shimano RD-R8000 GS

Qty : 1PC (come with 2

Smooth shifting by SIDE SWING mechanism

high stopping power in wet or dry conditions and excellent durability

Type: HG 12 Speed

COLOR:  Tan Wall

Recommended bottom bracket Press-fit                       : BB-RS500-PB

Weight: 158g (manufacturer information)

Pedal Spindle: 9/16"

Compatible for: 7/8 Speed

With a large amount of moisturizing agents

Front Difference: 10TTotal Capacity: 45TPulley cageType-SGS longMaterial: Aluminum/GFRP/Stainless steel/Steel