Fox Racing Shocks 981-02-397 3.5 Series 18in Bypass Shock Absorber 1in Tube 3 Comp 2 Reb

The Fox Racing Shocks 981-02-397 is an 18-inch 3.5 Series Bypass shock absorber designed for high-performance off-road racing and extreme terrain applications. Built with a 1-inch diameter tube and featuring a 3-compression / 2-rebound bypass circuit configuration, this shock delivers precise, tunable damping control that separates it from conventional monotube and twin-tube designs.

Fox's bypass shock technology uses a series of bypass tubes positioned along the shock body to allow fluid to bypass the main piston at specific points in the stroke. This creates distinct damping zones throughout the suspension travel — providing a compliant, low-speed ride over small bumps while delivering firm, controlled resistance during high-speed or large-displacement impacts. The result is outstanding terrain compliance without sacrificing bottoming resistance.

Key Features:

• 3.5 Series construction — robust, race-proven platform engineered for demanding off-road use
• 18-inch body length for extended suspension travel applications
• 1-inch bypass tubes — 3 compression circuits and 2 rebound circuits for multi-zone damping adjustment
• Bypass circuit design allows independent tuning of low-speed and high-speed damping characteristics
• High-quality internal components including precision seals and hard-anodized aluminum construction
• Compatible with custom off-road truck, UTV, and racing suspension builds
• Serviceable and rebuildable design for long-term performance and maintenance

Ideal for off-road race teams, serious trail runners, and custom suspension builders who demand maximum tunability and durability, the Fox 981-02-397 delivers the performance heritage that has made Fox Racing Shocks a leader in off-road suspension technology.