What is the difference between GRX FD-RX810 and Ultegra FD-R8000?

The GRX FD-RX810 has a 46mm chainline (vs 43.5mm for road), clearance for up to 42mm tyres, and an integrated cable tension adjuster — features specifically designed for gravel bike geometry. The Ultegra FD-R8000 is optimised for road use.

Is the GRX FD-RX810 compatible with Di2 electronic shifting?

No — this is a mechanical front derailleur. The GRX Di2 system uses the FD-RX815 electronic front derailleur. Mechanical and electronic FD units are not interchangeable.

What chainring sizes does this support?

46T to 48T outer chainring, with up to 17T total capacity. This covers standard GRX 48/31T and 46/30T combinations used in gravel riding.

Shimano

Shimano GRX Front Derailleur, FD-RX810, 2x11-Speed, Brazed-On Type

Name: Shimano GRX Front Derailleur, FD-RX810, 2x11-Speed, Brazed-On Type
Brand: Shimano
SKU: CMB_WOW_IFDRX810F
Price: 4440.00 INR
Availability: InStock
Author: InstaSport Editorial

₹4440.00

Description

Specification Ergonomic power curve Integrated cable tension adjustment Natural stroke feeling Chainline +2.5 mm vs. conventional road FD Compatible with up to 42 mm tires More cable routing options Wider tire clearance Wider range front gearing Precise and easy front derailleur adjustment Features