RockShox BoXXer D1 Air Spring Kit

No, this specific kit is engineered exclusively for the BoXXer D1 platform (2024 and newer). It will not fit previous generations of BoXXer forks due to differences in stanchion diameter and internal architecture.

ButterCups are small rubber pucks located at the end of the damper and air spring shafts. They act as a secondary suspension system to absorb high-frequency trail chatter, significantly reducing hand and arm fatigue on long, rough descents.

This kit is designed for a 190mm travel configuration. If you are looking to change your fork's travel, you must ensure you are purchasing the specific air shaft length required for your desired travel setting, as this kit is fixed to 190mm.

If you are comfortable performing a standard lower leg service and air spring maintenance, you can install this kit yourself. However, it requires specific tools for removing the seal head and air shaft, so ensure you have the correct RockShox service manual and tools on hand before starting.

DebonAir+ is designed to provide a more consistent feel throughout the stroke, offering improved small-bump sensitivity at the beginning of the travel while maintaining better mid-stroke support. It effectively makes the fork feel more supple without sacrificing the bottom-out resistance needed for downhill riding.