Boxxer 35mm 2010-2018 and 2019-2023 Cartridge and Adaptor Kit

Ultimate Select+ Select Race RC Team RC2C R2C2 WorldCup/Keronite

fits both 26 and 27.5+/29er and 200 and 180 mm travel versions.



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.

20 mm Cartridge Damper Kit with fork rebound adjuster cap, ABS cone/lower casting adaptor, oil lock adaptor ring, adaptor arbor sealing nut
and oil lock snapring.

Self install kit includes custom valving, and midValves.

Thinking of upgrading your old Boxxer to the new Charger Damper?
Just order our open bath cartridge for your old Boxxer and be done with it.


• 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 activated low speed rebound
• Base valve adjuster screw with 22 clicks of activated low speed compression adjustment
Hydraulic Anti-Bottoming System (ABS) for end of stroke bottoming resistance
• 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 recomendations 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
• Designed to be self-installed or send it to us for installation if you need us to do the install

• Weight approx. 300 grams

Need us to install it for you, just send your fork to us and we will install it for $100 including Spectro 85/150 oil.

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 firmer feel without harshness, have that big hit set-up that still feels plush on square edged bumps!

Available for those who want to fiddle with their set-up:
Optional revalving kit for compression and rebound pistons, with revalving set-up charts





Boxxer 35mm

Boxxer 35 mm Cartridge Kit including Adaptor
and Midvalves installed, $549

Download: Boxxer 35 mm 2010-2018
Installation and Set-up Manual Rev C(50.5 MB)


Boxxer 2019-2021 install manual call for instructions(similar to late models Lyric.Yari,Zeb)
Download: 2016-20 Lyrik/Yari open bath installation manual (14.9 MB)
(same as pike manual)

Watch the Install Video(unedited sorry)

For details on Cartridge click here:

To order tools, revalving kits, and replacement adaptors click here:


Available for all models of
Boxxer 35 mm

Note that 2019 and newer cartridges are different and will not fit older models

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

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.

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 year the cartridge will be installed in.

Fork Year


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 have been using or wish to use.

Click here for sag setting Tips


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

Rider Ability

Choose your wheel size.

Wheel Size


Reviews and Comments:

PinkBike 2/13/2012 Review of the Boxxer Cartridge

Coil Conversion Kit / Options for air forks
Hybrid Coil and Air System


Open bath cartridge systyem above, stock charger damper below

Click here: to add Hybrid coil option


Have us install your cartridge for you

Ship us your fork, we will install your new cartridge
includes Spectro 85/150 Oil

Add option here, does not include shipping back to you, we will adjust your shipping total depending on where you live in the world and send you a Paypal invoice for the difference. This is not a rebuild, it assumes your fork is in good working condition with no leaks or scratches on the stanchions.

Price $129



Price $129, plus shipping difference