22-300mm C Spanner Wrench Hook Tool For Motorcycle Bike Shock Absorber Adjuster

Measure the outer diameter of your shock absorber's adjuster collar — the threaded ring you need to rotate. Match that measurement to the size range listed in the variant options. If your collar diameter falls between two ranges, select the next size up for a more secure hook engagement. When in doubt, consult your motorcycle or bicycle service manual for the specified collar diameter.

Yes. The tool is suitable for any shock absorber adjuster collar that uses a notched or slotted ring design, which is standard on most motorcycle rear shocks and many mountain bike rear shocks. Confirm that your shock uses a notched collar rather than a splined or pin-type interface before ordering.

The hook jaw is formed from hardened carbon steel, which provides sufficient rigidity for typical shock preload adjustment tasks. For shocks that are extremely stiff or corroded in place, applying a penetrating lubricant to the collar threads first is recommended to reduce the torque required and protect both the tool and the collar.

The zinc-plated finish provides a corrosion-resistant barrier suitable for workshop use and occasional exposure to moisture. For long-term storage in humid environments, wiping the tool with a light machine oil after use will extend the finish life. The plating is not rated for continuous immersion or salt-spray environments.

Many aftermarket coilover-style shocks use standard notched adjuster collars that are compatible with this wrench. Check the collar outer diameter against the available size variants. Some coilover kits include a dedicated spanner, so verify whether your unit uses a notched collar or a pin-hole style before purchasing.

The size number refers to the range of adjuster collar outer diameters the hook jaw is designed to span. Smaller variants (e.g., 22–26 mm) are suited to compact bicycle rear shocks and smaller motorcycle shock collars. Larger variants (e.g., 150–160 mm, 135–145 mm) are intended for heavy-duty motorcycle or ATV shock assemblies with wider adjuster rings. Always match the variant to your measured collar diameter.

Seat the hook jaw fully into a notch on the collar before applying force — partial engagement is the most common cause of collar damage. Apply steady, controlled pressure rather than sharp impacts. If the collar has not been adjusted in a long time, a penetrating lubricant on the threads will reduce the effort needed and lower the risk of slipping.