1x11 Gravel Crankset

GRX FC-RX810-1

This FC-RX810-1 gravel crankset is the 1x crankset that Shimano designed with a balance between weight and efficiency in mind. It is available with 170mm 172.5mm and 175mm crank arm lengths and comes with either 40T or 42T chainrings.

This gravel crankset's chain line is 49.7 mm - allowing for even more tyre clearance than the 2x 46.9mm chain line. The chainring P.C.D. is 110mm and the Q-factor is 151mm.

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Specifications

Model code: FC-RX810-1
Series: GRX RX815
Weight: 644g (40T), 656g (42T)
Chain line: 49.7 mm

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FC-RX810-2

2x11 Gravel Crankset

FD-RX815

Front Derailleur

RD-RX815

Rear Derailleur (2x)

RD-RX817

Rear Derailleur (1x)

ST-RX815

Hydraulic Disc Brake Dual Control Lever

BT-DN110

Internal Battery

EW-SD50

Electric Wire / E-Tube cable

EW-RS910

Frame/Handlebar Junction

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June 2, 2025Installation Guide

Installing a new chain - length and direction

Sizing and installing a new chain for your Di2 bike isn't hard, you just need to follow the right steps. This page quickly shows the chain sizing methods and explains chain directionality.

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