Progressive Suspension 444 Series FST Shocks For Harley
After more than a decade of ruling the roads with the road proven shocks, Progressive Suspension unveiled another breakthrough design. Dubbed Frequency Sensing Technology (FST) for its unique ability to dynamically adjust damping as you ride. The result is superior performance no matter the road conditions. A top mount threaded preload adjuster allows for fine tuning with a simple twist of the cap.
Features:

Frequency Sensing Technology (FST) allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality

Adjust spring pre-load by hand – no special tool needed

Progressive-rate spring

Deflective disc valving

Sold as a pair

Made in USA