GRX Di2 RD-RX817 Road Helmets BB Bearing Steel BB Shell

BB Bearing Steel BB Shell Thread T47 BB Shell Width 68mm Crank Spindle Diameter 28

To suit standard 1 1/8'' forks

Automatic keyway covers helps seal lock internals against the elements

For carbon frames that feature aluminum inserts (with a carbon/aluminum hybrid mounting surface)

Made from a heavy weight silicon

GRX Di2 RD-RX817 Road Helmets BB Bearing Steel BB ShellGRX Di2 11 speed rear derailleur for 1X cranks Adjustable chain stabilizer prevents chain slapping and drops Gravel tuned clutch tension can be toggled ON OFF to match the terrain Low sprocket: Max. 42T Min. 40T Top sprocket: 11T Attributes Cage GS Max Front Difference Single chainring only Maximum Cog 42T Minimum Cog 11T Primary Color Grey RD Capacity 31T RD Spring Type Shadow Plus RD Weight 318g Speed 11