Cone wrench

Double-ended cone wrenches, 13–16mm

A cone wrench or cone spanner is a tool used in bicycle assembly and maintenance to tighten and adjust the cones on a bicycle wheel. Cone wrenches are thinner and lighter than most other open ended wrenches that are used to work on bicycles. They should be used only for making adjustments to wheel's cones or for other applications such as centering brakes. Using a cone wrench in high torque applications such as loosening outer axle nuts may easily damage the wrench. Cone wrenches are typically about 2 mm thick, compared to approximately 7 mm for a standard open-ended wrench.

Cone wrenches are commonly sized between 13mm and 28mm. The sizes most commonly used today are 13, 15, and 17mm. Most sizes 19mm and above are used for specialty applications such as BMX and internally geared hubs.

References

Brown, Sheldon (August 1982). "Tool Tips: Cone Wrenches". Bicycling. Retrieved 2009-07-10.

Bicycle tools

Hub, wheel, and tire	Bicycle pump Cone wrench Spoke wrench Tire lever Wheel truing stand

Headset	Hex key

Drivetrain and bottom bracket	Chain tool Chain whip Peanut butter wrench

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