Coil Conversion Kit / Option
Dual Coil ABS
Hybrid Coil and Air System
Equal force system
With the dual spring system, one spring sits inside the positive
air chamber using the stock air cap with adjustable preload.
Uneven compression from single spring systems adds friction and causes
twisting of the arch and legs.
Currently we are offering a limited production 2015-19 Fox 36 front fork dual coil conversion option available now for 160 mm travel forks and rider weights of 165-215 lbs. This is an add-on option that installs as part of our open bath cartridge and is retro fit-able for current owners of our cartridge. Dual fork springs to reduce weight and torsion when compressing. Uses standard air shaft system with minor modifications to defeat the air chamber pressure system. Current pricing for the dual coils is $249, hybrid coil and air is $159 installed. Total weight of system is 340/170 grams. Dual coil system requires ABS hydraulic bottom-out system option with cartridge purchase.
The issue for coil conversion kits is the enormous amount of inventory required to suit all rider weights, models and fork travel differences. Currently we are only offering 2 spring rates and travel is limited to 160/150 mm for riders weights of 165-210 lbs. We can custom build the cartridge for 150 mm for riders weights of 160-190 lbs.
Spring rates set-ups available:
24 lb/in +24 lb/in=48 lb/in
Dual coil spring chart
Hybrid coil and air spring recommendations
Riders under 125-175 lbs use the 24 lb spring with air pressure needed
for appropriate sag
Adjustable preload 3 mm increments from 5 mm to 11 mm. Oil height
adjustment from 50 mm to 70 mm damper side add progression.
Requires minor modifications to stock air shaft piston and seal head to defeat air pressure for the dual coil system.
We are hoping to expand the options for firmer and softer spring rates as well as all travels of the Fox 36, Fox 34, Yari, Lyrik and Pike.
Shown above and below is the movement of the open bath cartridge oil lock ring as it reaches the bottom of the stroke, it is also adjustable in 3 mm increments to reduce the affect if desired. This allows you to add only the amount of bottoming resistance needed. All cartridge rods have multiple grooves to select the desired oil lock ring position.
For those debating on the ABS vs FvAT/HSB here is our recommendation
The abs is not normally needed unless you want to create a very linear feel by converting to coil or modifying the air side to be more linear (because most air forks are very progressive for the last 10 mm and act like a air bump stop anyways). The FvAT/HSB is needed if you do varying types of riding such as park groomed trails or jump lines which need a firm compression feel, and backside natural rocky and rooty trails need very soft high speed compression. This will force us to compromise your set up somewhere in between the two valving options. If we valve it for the park jump lines we can then use the FvAT/HSB system to create a blow-off system to prevent the harsh feel on the high speed rocks, roots and ledge bumps and retain the firmer valving for jump lines and groomed park trails.
Add option here
Only available as an open bath cartridge system option with ABS.
Add option here
Only available as an open bath cartridge system option.