Ultegra RX, GS 11 Spd. Di2 DOT Fluid BB Shell Width: 73mm

BB Shell Width: 73mm

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The RD-RX810 rear derailleur is compatible with road cassettes with a 34T low sprocket max

The family is now enriched by the new Cobra Edge: superior hydrodynamic design

With return spring

Ultegra RX, GS 11 Spd. Di2 DOT Fluid BB Shell Width: 73mmWith 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