High-performance, 7075-T6 aircraft aluminum construction a wet born piston rod and self-adjusting bearingRadial piston with straight flow and preload through a pre-combustion oil chamber offers optimum responseAnti-block system features a separate overpressure valve that prevents the shock from hydraulic lockRebound/ compression adjuster 50/30 clicksFeature progressive spring and threaded spring preload adjusterAdjusted for a solo rider and occasional two-up riding spring load can be adjusted to personal preferenceWhen rear fender clearance allows, the low shocks also fit on other H-D motorcycles not listed in the charts.