Street Performance IFP-R shocks are our V-twin specific, bolt-on suspension upgrade with 40 years of suspension heritage baked in. Customize your set-up with preload adjustment, rebound adjustment, length options, and spring rate choices. Whether you're cruising Sturgis or scraping floorboards on The Tail of The Dragon, the Street Performance IFP-R delivers on style, performance and, an overall quality damped ride.
- Model-specific optimized ride tune
- Gas-charged mono-tube, with internal floating piston (IFP)
- 1.5"" 6061-T6 aluminum type III hard anodized body
- Fully rebuildable and revalveable
- Advanced high-flow, deflective disk, velocity-sensitive damping
- 1/2"" low friction, super-finished hard chrome shaft
- Matte Black spring
- Available with standard or heavy duty spring rates
- Available in standard 13"" or low 12"" lengths
- Contrast-cut aluminum billet preload adjuster and spring seat
Rebound damping controls the rate at which the shock returns after it has been compressed. The proper rebound setting is a personal preference, and changes with rider weight, riding style and conditions.
A rule of thumb is that rebound should be as fast as possible without kicking back or feeling bouncy. For slower rebound, turn the rebound adjuster knob clockwise. For faster rebound, turn the rebound adjuster knob counter-clockwise.
Spring preload adjustability is used for setting sag or vehicle ride height. As a general rule, your sag should be 35% to 45% of full wheel travel, in order to provide optimal traction. To increase sag, you want to turn the spring preload ring counter-clockwise when the shock is viewed from the top. Alternatively, if you want to decrease sag (increase vehicle ride height), turn the spring preload ring clockwise.