Progressive Suspension

About Progressive Suspension

Progressive Suspension has been at the forefront of motorcycle suspension engineering since its founding in 1982. Over more than four decades, the California-based company has grown to become the largest aftermarket motorcycle suspension manufacturer in the United States, earning a reputation for pairing rigorous engineering with real-world performance. What began as a singular mission to build high-performance motorcycle suspension has evolved into a full lineup of products trusted by custom builders, touring riders, and OEM manufacturers alike.

Engineering That Riders Can Feel

The secret to Progressive Suspension's longevity lies in its development process. Every product is refined through computer-aided design, shock dynos, and extensive real-world field testing before it reaches riders. A hallmark of their design philosophy is the use of variable-spacing coil technology — progressively wound springs that become stiffer as they compress, delivering a supple response over small road imperfections while still handling hard impacts with authority. Their proprietary Frequency Sensing Technology (FST) takes this further in premium shock lines, automatically adjusting damping based on bump frequency for an intelligent, adaptive ride.

Their shock absorber lineup spans an impressive range of series — from the iconic 412 and 413 models designed for classic Harley-Davidson Sportsters and Big Twins, to the touring-focused 944 series with its Quik Preload system, to the high-performance 494 Sport Series for more aggressive riding. Coverage extends well beyond Harley-Davidson, with fitments for Honda, Kawasaki, Yamaha, Suzuki, Indian, and more — including ATVs and UTVs — making Progressive one of the most versatile suspension brands in the powersports world.

Complete Suspension Solutions

Progressive Suspension doesn't stop at rear shocks. Their suspension kit offerings address the entire chassis, including monotube fork cartridge kits that convert standard damper-rod forks into high-performance cartridge systems, drop-in front fork lowering kits that reduce ride height without disassembling fork tubes, and fork spring kits engineered to reduce dive and improve front-end stability. Whether a rider wants to lower their bike for a custom aesthetic, improve handling on long-distance tours, or simply replace worn-out factory components, Progressive has a bolt-on solution developed specifically for their make and model.

Beyond product breadth, Progressive Suspension has earned the confidence of domestic original equipment manufacturers, supplying suspension components at the OE level — a testament to the precision and consistency their factory processes deliver. Their systems have found homes on premier custom builds, production trikes, and iron destined for the open road.

A Legacy Built on Ride Quality

For riders who understand that suspension is the foundation of every other performance characteristic — braking, cornering, comfort — Progressive Suspension represents over 40 years of focused expertise. From a weekend cruiser to a cross-country touring rig, upgrading to Progressive components transforms how a motorcycle interacts with the road beneath it.