The RockShox DebonAir+ Upgrade Kit lets you upgrade the suspension of your ZEB suspension fork as of the 2021 model. With DebonAir+ you benefit from improved responsiveness to smaller bumps compared to DebonAir. In addition, the fork with larger air chamber is higher in the suspension travel and thus provides more control and confidence on steep descents. Additional comfort is provided by the ButterCup at the lower end, which absorbs some light, high-frequency vibrations on rough ground and thus prevents arm pump and fatigue in the arms and hands. The kit contains the complete inner workings of the left fork rod.