Ultegra RX, GS 11 Spd. Di2 DOT Fluid With return spring

With return spring

into a real long distance runner

RESET design features reset mode window (running change to ALL models)

BB Shell Width: 73mm

Ultegra RX, GS 11 Spd. Di2 DOT Fluid With return springWith an integrated chain stabilizer mechanism, the ULTEGRA RX 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 RX805 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. CAGE LENGTH: GS Medium TOTAL CAPACITY: 39T MAX FRONT DIFFERENCE: 16 AVERAGE WEIGHT: 280g