Hub Cone Wrench - 1612/2

A hub cone wrench has to be thin enough to fit between the cone and the locknut on a cup-and-cone hub, strong enough to hold the cone steady while a second wrench torques the locknut against it, and flat enough on the working faces that it doesn't round the cone's flats after a few service cycles. The 1612/2 is the entry-grade Unior cone wrench built around those three constraints, sized for the four hub cone widths a home or shop mechanic encounters across most current and recent-generation Shimano hubs. How it works Hub cone wrenches engage on the cone's two parallel flats, the same way a standard open-end wrench engages a nut. The difference is the wrench body's thickness: a hub locknut sits within a few millimeters of the cone face, and a standard combination wrench is too thick to clear the locknut while engaging the cone. The 1612/2 is ground to a thin enough body to slide into the cone-and-locknut gap, with the open end shaped for the cone flats. The wrench is used in pairs. One