Progressive Suspension has focused exclusively on American V-twin suspension since 1982, and its Monotube fork cartridges and 400/970/970G shock series are among the most common upgrades on baggers and Softails. For most riders the stock rear shock is the single worst part on the bike — this is the fix.
Progressive 412 Series shocks deliver consistent damping for Harley-Davidson cruisers through nitrogen-charged, velocity-sensitive valving in a double-wall steel body. A five-position preload adjuster lets you customize the ride for your weight and riding style without tools.
Upgrade your Harley-Davidson Touring, Softail, or Dyna with the reliable performance of Progressive 412 Series shocks. These shocks are built with a durable double-wall steel damper construction, ensuring longevity and consistent performance. The high-pressure nitrogen gas charge combined with multi-stage velocity-sensitive damping provides a smooth, controlled ride that absorbs road imperfections and maintains stability, making every mile more enjoyable.
The Progressive 412 Series shocks are a fundamental upgrade for any rider looking to improve their Harley's handling and comfort. Their intuitive preload adjustment allows you to easily fine-tune your suspension for solo rides, two-up adventures, or when carrying extra gear. Pair these shocks with a quality front suspension upgrade for a balanced and confidence-inspiring ride across all conditions.
Do I need to adjust the preload when I install these shocks?
Yes – use the 5-position cam adjuster to dial in preload for your body weight and riding style. Light riders generally use lower positions; heavier riders or those with passengers will need more preload.
What's the benefit of nitrogen-charged shocks?
Nitrogen charging prevents cavitation and foaming of the shock oil, which ensures more consistent damping performance, especially during extended use or aggressive riding.
Will these shocks make my ride feel softer or firmer?
These shocks offer a more controlled and consistent ride than stock. You can adjust the preload to make it feel softer or firmer within its range, tailoring it to your preference and load.
| BRAND | Progressive |
| TYPE | Shocks and Struts |
| SKU | T14-669140 |
| WEIGHT | 9.9 lb |
I bought these for my '06 FLHR and could not be happier. I'm 6' 275 lbs so I went with the heavy duty option. Took about 30 min. to change shocks and the ride has improved considerably, took the jolt out of hitting heaves in the road.
While removing the rear wheel for some other service they just quite literally fell apart in two pieces leaving me with a garage floor full of suspension oil and one unusable shock. Spoke with their warranty rep who told me in so many words that its not their problem. Dissapointed to say the least.
So far loving these, the ride is much smoother and an awesome look. Going for the 12" was a good choice, raised it but not too much.
Just changed from my stock Harley to the 13-in and what a difference it made. Bike handles better and rides better
