Open Bath
Cartridge Kit
side view


Manitou Mezzer Open Bath Cartridge and Adaptor Kit


Available on all models of Mezzer




The best performance modification you will ever do to your fork!

Complete replacement of the damper with our open bath cartridge!

This will make your fork feel like a completely different fork, because it is!

Low speed damping that’s firm but still blows-off to be plush on small bumps,
Reduced fork dive that eases the fork through the travel without harshness,
No more high speed compression spikes and no more bottoming with the ABS system.
Low speed compression and rebound adjusters help fine tune the valving as to how it transitions from low to mid and when the high speed kicks in,
Much more effective than the other dampers attempt to add high speed adjustment without the proper shim stack.


Open Bath Cartridge system for better lubrication, smoother action and low maintenance.

External low speed compression and low speed rebound adjusters

Internal revalvable custom high speed compression and rebound valving.

Internal Anti-dive MidValving.

Optional ABS(Hydraulic Bottom Out) for coil forks or when air ramp-up is not enough to prevent bottoming.

Includes the 20 mm Cartridge Damper Kit Insert, adaptors and air side fork cap required for rebound adaptor cap.

Self install kit, user serviceable and revalvable.

Adjustable travel positions are still functional as only the damper side is modified.
It will work in all travel modes, the tune can be set for a best compromise between
the two or we can set it up for the higher travel mode, because this is the more sensitive position generally used for DH.
When set to the reduced travel mode we suggest that you stiffen the suspension up with the clickers, same as you did with the stock damper.

Available for all models including 27.5 and 29
(coil, air and optional Hybrid coil/air versions coming soon)


• Replacement open bath maintenance free speed sensitive damper assembly, "set it and forget it"
• 20 mm ID damper tube with shimmed 4 port MX style compression and rebound valving pistons
• Upper fork cap adjuster screw with 22 clicks of low speed rebound
• Base valve adjuster screw with 22 clicks of low speed compression adjustment
• Speed sensitive multi-stage shimmed compression, midvalves and rebound valving
• Custom valved and set-up for each rider with printed set-up charts
• Fork spring and air pressure recommendations help us tune to to your weight riding style
Midvalve kit included with standard cartridge to prevent fork dive, adds low speed compression without harshness, optional midvalve revalving shim kit and set-up charts available
Optional Hydraulic Anti-Bottoming System (ABS) for end of stroke bottoming resistance
• Optional revalving kit for compression and rebound pistons, with revalving set-up charts
• Optional HSB compression blow-off system for the firmer feel with-out harshness
• Designed to be self-installed or send it to us for installation if you need us to do the install
• Weight approx. 300 grams

Includes New Interactive Set-Up Chart


Optional FvAT/HSB
Floating Valving Assisted Threshold High Speed Blow-off System

click here to add it to your cartridge

For the supportive feel without harshness, have that park ride set-up that still feels plush on natural terrain square edged bumps!

*Self install kit assumes good working knowledge of internals and service procedures.

Need us to install it for you, just send your fork to us and we will install it for $129 including Spectro 85/150 oil.

Oil not included with self-install cartridge.



Open Bath
Cartridge Kit
Section view


Mezzer Open Bath Damper Cartridge System

Open Bath Cartridge for Mezzer.

Base Valve Adaptor

Mezzer Hybrid Coil/Air Cartridge Damper System

order Hybrid coil system here

Available on all models
Order Here

Manitou Mezzer Open Bath Cartridge Kit including adaptors
and Midvalves installed, $549

Requires Mezzer IRT Fork Cap to be adapted to our cartridge.

Custom valved and set-up to rider weight, ability and riding style.

Installation similar to Pike/Revelation, actual manual soon!

Watch the Install Video(unedited sorry)

Pike/Revelation open bath installation manual (14.9 MB)

Need to have us install it for you? Ship your fork to us and we can install it for $129 plus shipping, includes Spectro 85/150 oil.

Call or email us for custom Hybrid coil options.

Choose the type of riding that you will be doing so we can custom valve it to your specific needs.

Click here for a description of our definitions

Type of Riding

Choose your fork model that the cartridge will be installed in.

Fork Model

Choose your fork travel that the cartridge will be installed in.

Fork Travel

Choose your fork air spring system that your fork has.

Fork spring system

Choose rider weight.
Rider weight is without gear, we add 5-7 lbs for DH gear, 7-10 lbs for All-Mtn/Freeride.

Rider Weight

Choose the spring rate/air pressure you will be using which gives you 22-25 % sag.
We need this number to help set-up your fork rebound damping correctly.

Click here for sag setting Tips

Spring Rate/Air

Choose your rider ability for us to set-up the cartridge.

Rider Ability