GRX ST-RX610 Shifter/Brake Lever with BR-RX400 Disc Brake Caliper seal kit The Dakine lumbar reservoir is

The Dakine lumbar reservoir is the same one that comes in mountain bike hydration packs

Protects stanchions and dust seals from rocks and debris

and the CNC machined reversible screw on valve head is compatible with both Presta and Schrader valves

5mm inner width rim that shares pedigree with the hollow bead wall Enduro family

GRX ST-RX610 Shifter/Brake Lever with BR-RX400 Disc Brake Caliper seal kit The Dakine lumbar reservoir isThe Shimano GRX ST RX610 dual control lever delivers light and responsive shifting for mixed terrain riding. The textured hood and anti slip brake lever surface increase control on bumpy terrain. The GRX BR RX400 2 piston flat mount hydraulic disc brake caliper features a low profile design with ICE technologies to provide greater control and excellent heat dissapation for mixed terrain riding. 2x shifter with brake lever for use with GRX RX610 12