Park Tool DCW-1,2,3,4 Cone Wrench

Cone wrenches are specialized, thin-profile tools designed to adjust the bearing cones on cup-and-cone bicycle hubs. Because the locknuts on these hubs are often recessed or very thin, standard wrenches are usually too thick to fit into the space, making these specific tools necessary for proper hub maintenance.

The set includes overlapping sizes because different hub manufacturers use varying locknut thicknesses and spacing configurations. Having both the DCW-1 (13mm/14mm) and DCW-4 (13mm/15mm) ensures you have the right tool profile to fit your specific hub's locknut and cone interface without damaging the hardware.

Yes, these are professional-grade tools. They are crafted from heat-treated steel and nickel-plated, which provides the necessary hardness to prevent the jaws from spreading under torque while resisting rust and corrosion over time.

While they are designed specifically for hub cones, their thin, open-ended profile makes them useful for other tight-clearance tasks on a bike, such as adjusting certain types of pedals or older bottom bracket lockrings. However, they should not be used as a substitute for standard wrenches on high-torque fasteners, as the thin metal is optimized for precision rather than heavy-duty leverage.

Yes, you will typically need a standard wrench in addition to these cone wrenches. You use the cone wrench to hold the cone in place while using a standard wrench on the locknut to secure the adjustment.