SHIMANO Rear Derailleur RD-RX817, GRX,11-SPEED, 1x11, Di2 closeout and works with our StreamLine

and works with our StreamLine towers to get the heavy duty job done right

Adjustable entry and release tension settings

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

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

The pure shifting performance of Eagle AXS™ is now available with GX

SHIMANO Rear Derailleur RD-RX817, GRX,11-SPEED, 1x11, Di2 closeout and works with our StreamLineWith 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