F-O-A Spring Rate Calculator
F-O-A Spring Rate Calculator How To

Dual Rate Example
Triple Rate Example

Compression Valving Specs
Rebound Valving Specs

Performance Shock Tuning Guide
Performance Shock Valving Guide

F-O-A Re-Valving Instructions
F-O-A Shock Rebuild Instructions

F-O-A Patent PENDING SEAL HEAD

F-O-A Shock Rebuild Video


Spec Sheets

2.5″ Coil Over Shock w/ Reservoir Parts Spec Sheet


Shock Lengths

2.5″ Shocks

Shock Length, Eye to Eye Collapsed Extended
6″ 14.5″ 20.5″
8″ 16.5″ 24.5″
10″ 18.5″ 28.5″
12″ 20.5″ 32.5″
14″ 22.5″ 36.5″
16″ 24.5″ 40.5″
18″ 26.5″ 44.5″

2.0″ Shocks

Shock Length, Eye to Eye Collapsed Extended
6″ 12.5″ 18.5″
8″ 14.5″ 22.5″
10″ 16.5″ 26.5″
12″ 18.5″ 30.5″
14″ 20.5″ 34.5″
16″ 22.5″ 38.5″
18″ 24.5″ 42.5″