Progressive Suspension 420 Series

Progressive Suspension 420 Series Very nicely made shock absorber; looks like custom made. Chromoly steel; rebuildable.  Nitrogen gas charged.  Comes with cool-looking progressive rate springs in black or red. Internal bladder eliminates need for external reservoir.   Five position damping adjustment. Threaded collar adjusts preload but collar is a bit stiff and doesn’t turn easily.   Provides …