Fox 40 RC2/RC/R Cartridge and Adaptor Kit
The best performance modification you will ever do to your fork!
This will make your fork feel like a completely different
Semi-sealed cartridge and open bath ABS system for better lubrication and to minimize oil volume.
Smart Adjust Threshold Compression Damping
User serviceable, uses auto volume pressure spring system,
no bladder or nitrogen charging required.
Cartridge ships with the internal damper oil already installed. (Spectro 85/150)
External low speed compression and rebound adjusters, Internal revalvable custom high speed compression and rebound valving, threshold reconfigurable.
Internal Anti-dive MidValving with optional shim kit for custom tuning.
Includes the 20 mm Cartridge Damper Kit Insert, ABS
cone/lower casting adaptor, adaptor arbor sealing nut, oil lock adaptor
Self install kit includes custom valving, and MidValves.
Optional Pressure springs Soft, Hard, and Regressive available
Optional Smart Adjust Progressive, Linear, and Regressive systems available.
Weight 450 grams (Fox Fit Cart 314 grams) filled with oil.
Fits all Fox 40 Float/RC2 Fit/RC2/R Models.
Replacement open bath maintenance free speed
sensitive damper assembly, "set it and forget it"
*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 $100 including Spectro 85/150 oil.
Buy an older version or the 40R fork and install the our cartridge.
You end up with a new Fox 40 with our better performing cartridge.
Images of Cartridge Installed
New Blue Adjuster for Low Speed Compression
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 $100 plus shipping, includes Spectro 85/150 oil.
Have us install your cartridge for you
Ship us your fork, we
will install your new cartridge
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.
The Avalanche Advantage over the RC2 FIT/RC2/RC/R cartridge:
Uses a pressure spring system to maintain proper minimum preload charge on the damper oil, this prevents cavitation(vapor bubbles that disrupt the damping feel).
Pressure spring system provides a linear feel to damper rod stroke, as compared to air charged and bladder systems, the rate can be changed up or down with optional pressure springs.
A larger (20mm vs 15.5mm) 4 port rebound valve that has more low to midspeed transition control and optional high speed shim configurations for different spring rates and rider conditions.
A midvalve with user tunable shims/valving that provides anti-dive feature while still blowing off without low speed harshness on small bumps.
The same DHF proven design (21.2 mm) 4 port compression valve with optional revalving charts and shims available to fine tune your fork for your individual riding conditions and ability.
End of travel position sensitive Anti-Bottoming system uses the outer slider tube and lower casting to take the load of the big hits,
as compared to the Fox dampers, the internal cartridge tube and rod of the damper are not spared from the stress and strain of these loads.
User serviceable, all parts are available here at Avalanche to service or modify the internal set-up. Oil is filled though the top of cartridge and self setting with one compression stroke.
Revalving kits can be purchased from Avalanche or any suspension tuning shop that carries standard 6 mm shims.
The inverted design prevents that blown, no rebound damping feel that you would get from the original RC2/RC/R damper when the bladder failed.
High speed adjustment is at best a compromise of the original shim stack, depending on the high speed spring preload adjuster rate and where the pressure is applied
on the shim stacks you can get less than desirable results in damping feel, i.e. preloading the outside rim of the shim may make the high speed stiffer,
but also creates mid and low speed harshness in the damper.
The original R2/RC/R large compression adjuster protrusion at the bottom of the fork is eliminated and cleanly redesigned and moved to the top for easy access.