RockShox SID B4 DebonAir Shaft

This shaft is designed specifically for compatible SID B4 models. Before purchasing, verify your fork's exact model year and chassis type, as RockShox air shafts are not universally interchangeable across all SID generations.

If you are comfortable performing basic suspension service, you can install this yourself. You will need standard suspension tools, fresh fork oil, and the appropriate grease, along with the service manual for your specific fork model.

Adjusting your travel to 110mm is a great way to fine-tune your bike's geometry and handling. It can help you strike a balance between climbing efficiency and descending stability if your current setup feels slightly off for your local trails.

Generally, no, but it is highly recommended to perform a lower leg service at the same time. Since you are already opening the fork, replacing the seals and fresh oil ensures the new shaft performs as smoothly as intended.

This product typically includes the air shaft assembly itself. You should check the specific packaging contents, but it is standard practice to have a fresh seal kit on hand to replace any O-rings or seals that may be worn during the disassembly process.