Fox 223-00-005 Aluminum 2.5" Reservoir Internal Floating Piston Uses 029-00-328 O-Ring And 5/16 Band

Aluminum piston fits Fox 2-1/2" STEEL reservoirs. This aluminum piston is threaded 1/4"-20 coarse thread, allowing you to set the depth and also purge out any air by plunging the piston in and out of the reservoir during assembly. It normally uses 029-00-328 o-ring or it can use 035-00-328-A quad ring.

Note: When Fox switched from steel reservoirs to aluminum on their 2-1/2" shocks, all of the internal parts were also changed because the aluminum reservoir has a smaller inside diameter than the steel reservoir. This piston is too large in diameter to work on an aluminum reservoir.

All German Motorsports shock reservoir IFP internal floating piston depth tool provides a quick and accurate method of measuring and setting the shock reservoir piston depth during service. The tool is an excellent way to monitor and prevent possible piston movement while bleeding air from your shock. Its heavy duty construction ensures proper function and long life. Works on all major reservoir brands and lengths that are threaded 1/4-20 such as Fox Shocks.