Park Tool HCW-5 Double-Ended Bottom Bracket Lockring Spanner MFPN=GM4580-34 and updated the core with

and updated the core with a TrueBlend design that lets them tune the flex to perfection

It works with all commercially available MTB and E-MTB drivetrains from Shimano to Box to Sunrace

Brake Lever Actuation Hydraulic Rotor Included No Brake Caliper Type Post Mount Color Black/Gray Hydraulic Fluid Type Mineral Oil Brake Lever Use Left or Right Pad Compound Semi-Metallic Hydraulic Hose Length 2000 Adjustable Reach Yes Adjustable Contact Point Yes Weight 255

Super fast to fit

and provides stability on any surface

Park Tool HCW-5 Double-Ended Bottom Bracket Lockring Spanner MFPN=GM4580-34 and updated the core withPark Tool HCW 5 Double Ended Bottom Bracket Lockring Spanner. HCW Series Bottom Braket Tools