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.
This Progressive Fork Cartridge Kit is engineered specifically for 2017 and newer Harley-Davidson Softail models equipped with 49mm front ends. It's designed to revolutionize your bike's handling, featuring adjustable preload, progressive-rate springs, and advanced Frequency Sensing Technology (FST) damping. Riders will immediately notice reduced brake dive and significantly improved cornering grip.
The new generation of Harley-Davidson Softail models offers a great platform for performance upgrades, and the front suspension is a key area. This Progressive Fork Cartridge Kit unlocks the full potential of your 49mm front end, transforming a capable bike into a truly dynamic machine. The combination of progressive-rate springs and FST damping delivers a controlled, responsive ride that excels in aggressive cornering and everyday cruising alike.
Beyond its superior damping capabilities, this kit offers practical customization for your Softail. You can choose to install the cartridges in either a 1-inch or 2-inch lowered configuration, allowing you to achieve your desired ride height and stance. This versatility, combined with the performance benefits, makes it an ideal upgrade for Softail riders who demand both aggressive handling and a personalized look.
Does this kit come with lowering options?
Yes, this Progressive fork cartridge kit can be installed in either a 1-inch or 2-inch lowering configuration to achieve your desired ride height.
Will this fit my older Softail with 39mm forks?
No, this kit is specifically designed for 2017 and newer Harley-Davidson Softail models equipped with 49mm fork tubes. It will not fit models with 39mm forks.
What is Frequency Sensing Technology (FST)?
FST damping is an advanced technology that allows the damping to react differently based on the speed and frequency of fork movement, providing a smoother ride over small bumps and firmer control during hard compression.
| BRAND | Progressive |
| TYPE | Fork Cartridge Kits |
| SKU | T14-669281 |
| WEIGHT | 0.3 lb |
this item is a single shock but made to look like two shocks in ad photo. Did not install because of this, as my style of riding is probably much more aggressive than average rider. I require stability and this appears to be anything but stable
So I had the suspension rebuilt on my Harley Heritage after OEM seals busted with only 6800 miles. I decided to purchase the Progressive Monotube suspension and I have to say what major difference while on a group ride. I felt the responsive and balanced compared to the original OEM suspension. The I immediately felt the wheels snugged to the pavement and while taking corners without any problems. I'm super stoked about the new suspension.
Haven?t had the chance to install yet, it looks like it will do what?s intended for, only concern I have is it looks like there a part missing if anyone can chime in and let me know from the pic. That?s why only 4 stars.
