Shimano GRX Hood Bracket Cover for ST-RX810 - Y0JK98010 Size_700x38c 44 mm) ✔ Alloy lock

44 mm) ✔ Alloy lock ring ✔ Outside diameter_160 mm ✔ Outside diameter_180 mm ✔ Outside diameter_203 mm ✔ Pad material compatibility_Metal ✔ Pad material compatibility_Resin ✔ Pad lining shape compatibility_Narrow ✔

Less fatigue on long tours

An advanced matrix of intermediate modulus fibers creates a frame that's light

The larger

And because the DHT treatment slows down chain elongation

Shimano GRX Hood Bracket Cover for ST-RX810 - Y0JK98010 Size_700x38c 44 mm) ✔ Alloy lockBracket Cover (ST RX810) WP Y0JK98010 COMPATIBLE MODEL ST RX810 L, ST RX810 LA, ST RX810 R PRODUCT SPECIFICATIONS MODEL NO WP Y0JK98010 SERIES GRX 11 speed Color Black Sales Unit pair