MRP Noken High Volume Air Cap for Suspension Forks - FOX 38

The Noken is a spring upgrade that increases air-spring volume, reducing the compression ratio and creating a more linear spring curve that mimics the plush feel of a coil spring.

Key Features of the MRP Noken

• Creates a more linear spring curve with a less dramatic spring rate change near bottom-out
• Increases the positive spring volume by 1.1 Bottomless Tokens (RockShox Zeb and RS35 models) or 1.5 volume spacers (Fox 38 model)
• Installs with a 32mm six-sided socket (torque to 25 Nm / 220 in-lbs)

Compatibility Details

• RockShox Zeb model compatible with Zeb (A1+) and Domain (A1+). It is NOT compatible with the Zeb B1 (2027).
• Fox 38 model compatible with Factory, Performance Elite, and Performance models, including E-tuned versions.
• RockShox 35mm model compatible with Lyrik (B1+, C1+, and D1+), Pike (B1+ and C1+), Revelation (35mm A1+), and Yari (B1+)
• Fox 36 model compatible with 2018-2025 Fox 36 Factory, Performance Elite, Performance, and Rhythm models, including E-tuned versions. As well
• as 2019+ Marzocchi Z1 models.
• MY26 model compatibility info coming soon!

Important Notice!

The Noken is 10-13mm taller than standard damper control knobs, so it’s important to confirm downtube clearance before installation.

About the Noken:

By expanding the air chamber space above the crown, the Noken increases spring volume by the equivalent of 1.1 Bottomless Tokens in RockShox Zeb and 35mm forks or 1.5 volume spacers in Fox 38 and 36 forks. This simple upgrade addresses a key challenge for many riders with long-travel forks: finding the right balance between a supple initial stroke, strong mid-stroke support, and fully utilizing all the fork's travel. With the Noken, you can optimize that perfect trifecta.

Recent air spring design evolution has focused on increasing negative air chamber volume to improve small-bump sensitivity. A larger negative volume helps lower the initial spring rate, letting your suspension better absorb minor trail imperfections and improving overall sensitivity. However, the trade-off is that a larger negative chamber can reduce positive volume, making the fork progressively stiffer toward the end of the stroke and preventing you from using all your travel.

This is where the Noken shines. It allows you to enjoy the benefits of a larger negative air volume without the usual trade-offs. With the Noken, you can preserve small-bump compliance and mid-stroke support, while also regaining the travel that is typically lost due to the harsh, steep progression of some stock air springs.

Because of the increased hight of the cap, you can use the new Riser Crown Race to create the needed clearance, available in HighRise (+10mm) or LowRise (+5mm) options.