Progressive Harley-Davidson 444 Series Shocks 13.0in Super Heavy Duty - Black

Progressive Harley-Davidson 444 Series Shocks 13.0in Super Heavy Duty - Black

Marsoni

M251S

$430.48

Get it in 3 business days with 1 day shipping. Friday, May 29

Progressive Harley-Davidson 444 Series Shocks 13.0in Super Heavy Duty - BlackThe 444 Series Shocks feature a proprietary patented Frequency Sensing Technology (FST) that has the unique ability to dynamically adjust damping as you ride; what this means is whether you're hitting the small or big bumps in the road, the shock distributes oil through ports accordingly to soak up the hit making for an ultimately comfortable ride. A top mount threaded preload adjuster allows for fine tuning with a simple twist of the cap. 444 Series

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UPDATE: Two tips broke off when unplugging them from the binding post and are now lodged in. Inexcusable and an utterly poor product. Solid connection in the binding post with no wobble or wiggle. They require some force to insert into the binding post, but once they're in they remain snug. I also tried removing and reinserting a few times and the connection remained solid. I've used other plugs in the past that have a softer tip and easily deform after one or two insertions. These do not have that issue.

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Reviewed in the United States on January 11, 2026