RockShox BoXXer Lower Crown & Steerer

This assembly is designed specifically for BoXXer forks utilizing a 35mm chassis. Before purchasing, verify your fork model year and stanchion diameter to ensure it matches the 35mm specification, as RockShox has updated the BoXXer chassis dimensions over different generations.

Not necessarily. While it fits the 35mm chassis, you must confirm that the offset and steerer tube length requirements match your current setup. It is intended to restore structural integrity, but fitment depends on the specific generation of your fork.

Replacing a crown and steerer assembly is a precise task that requires specialized tools, including a hydraulic press to safely remove and install the stanchion tubes. Unless you have experience with fork overhauls and the proper equipment, we recommend having a professional mechanic perform the installation to ensure safety and alignment.

The crown and steerer assembly is often replaced if the steerer tube has been cut too short, if there is creaking coming from the crown-stanchion interface, or if the unit has sustained damage in a crash. Replacing the entire assembly ensures the structural interface between the handlebars and the fork remains stiff and secure.

This part is typically sold as an assembly, but the specific configuration can vary by part number. Always check the product specifications to confirm if the stanchion tubes are included or if you are purchasing the crown and steerer to be pressed onto your existing tubes.