Progressive Suspension Motorcycle Shock Absorbers
Progressive Suspension rear shocks for Harley-Davidson Softail, Sportster, Touring and Dyna models, with twin shocks for Honda, Triumph and Kawasaki models. Most are 412 Series twin shocks in black or chrome, standard or heavy-duty, alongside 422 Series Softail shocks, a 465 Series shock for the Milwaukee-Eight Softail and 444, 494 and 944 Series shocks for Touring and Dyna.
The series on this page
412 Series: the twin shock Progressive calls its value shock, with a five-position cam preload adjuster and standard or heavy-duty springs. It has its own page, linked below, which covers its construction.
422 Series: a Softail shock for 1989 to 2017 models that Progressive sells only in an adjustable ride height version, from stock to two inches lower. The version with remote adjustable preload puts the adjuster behind the left passenger peg.
465 Series: a gas monotube shock Progressive designed for the Milwaukee-Eight Softail, with five-position rebound adjustment. Progressive says each length changes the height at the axle by about one inch.
444 and 944 Series: both use Frequency Sensing Technology, which Progressive says adjusts damping as you ride. Preload is set by hand with no special tool. The 944 Ultra Touring is designed to sit one inch lower than a stock Harley-Davidson Touring model.
494 Sport Series: Progressive describes a high-pressure gas monotube shock with adjustable rebound damping and preload adjusted by hand.
Also from Progressive Suspension: All Progressive Suspension · 412 Series Shocks · Fork Springs · Lowering Kits · Monotube Fork Cartridge Kits · Suspension Tools.
Will it fit my motorcycle?
Each title names the motorcycle the part is listed for, with the years where the supplier gives them. Where a part fits more models than the title can hold, it says so, and the Fitment section on the listing gives every model and year. Check the year range as well as the model name, and the shock length against the shocks on your bike now.
Does a shorter shock lower my bike?
Yes, shock length sets rear ride height, and every title gives the length. Progressive warns that longer than stock shocks need wheel travel clearance checked before fitting. Some Softail shocks here are adjustable for height instead, from stock to two inches lower on the 422 Series.