Progressive Suspensions 444 series shocks feature a breakthrough design. Dubbed Frequency Sensing Technology (FST) for its unique dynamically adjusting as it allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality. Together with the deflective disc valving this results in superior performance no matter the road conditions. A top mount threaded preload adjuster allows for fine tuning with a simple twist of the cap by hand. Your model motorcycle is given together with the stock shocks length. Feel free to take longer or shorter shocks from the same application group, but note that shorter than stock shocks will lower the rear of the motorcycle. Fender to tire clearance should be checked after installation.