I’m working with a REVELATION RC A1 (2018+), 150mm. Changing travel to 160mm. Simple enough.
I ordered the part: “11.4018.026.034 Air Shaft DebonAir – PIKE B1/Revelation (35MM) (160mm 29/27)” as specified in the SRAM 2018 parts book:
The problem? The replacement doesn’t match the stock part.
- The head height is very different
- The head is riveted rather than bolted on
- The stock part has an air valve in the base (this seems pretty important)
- The top out bumper mates to the stock part but not in the replacement.
- The top out bumper seems far softer than older models.
I got the official word:
The spare parts list shows that 2018 Pike and Revelation air shafts are interchangeable and they are not! This is causing just these problems. The proper shaft needs to be used and should be available in the complete spring internals kit. The primary difference is the use of negative air storage in the actual shaft, as made clear with the valve.
Basically, until this is corrected, make sure to order ONLY:
11.4018.010.237 – Spring Internals Left Revelation 27.5/29 120 DebonAir (includes top cap, DebonAir spring, and shaft bolt) – Revelation RC A1 (2018+)
11.4018.010.238 – Spring Internals Left Revelation 27.5/29 130 DebonAir (includes top cap, DebonAir spring, and shaft bolt) – Revelation RC A1 (2018+)
11.4018.010.239 – Spring Internals Left Revelation 27.5/29 140 DebonAir (includes top cap, DebonAir spring, and shaft bolt) – Revelation RC A1 (2018+)
11.4018.010.240 – Spring Internals Left Revelation 27.5/29 150 DebonAir (includes top cap, DebonAir spring, and shaft bolt) – Revelation RC A1 (2018+)
11.4018.010.241 – Spring Internals Left Revelation 27.5/29 160 DebonAir (includes top cap, DebonAir spring, and shaft bolt) – Revelation RC A1 (2018+)
