SHIMANO Rear Derailleur RD-RX817, GRX,11-SPEED, 1x11, Di2 closeout Adjustable entry and release tension

Adjustable entry and release tension settings

2 year limited manufacturing warranty

Combine retro styling with amazing comfort and you get Serfas' Cruiser Classic saddle

68 Durometer Center Ridge For Long Life / 58 Durometer Sides For Enhanced Cornering

SHIMANO Rear Derailleur RD-RX817, GRX,11-SPEED, 1x11, Di2 closeout Adjustable entry and release tensionWith 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 RX817 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. and is compatible with mtb cassettes with a 42T low sprocket max. Top sprocket: Max. 11T