Progressive Suspension RSM50 50 Amp RV Surge Protector Module

Progressive Suspension

<h3>About Progressive Suspension</h3><p><strong>Progressive Suspension</strong> 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 <a href="/823-progressive-suspension-shock-absorber-7556">the largest aftermarket motorcycle suspension manufacturer in the United States</a>, 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.</p><h3>Engineering That Riders Can Feel</h3><p>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 <strong>variable-spacing coil technology</strong> — 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 <strong>Frequency Sensing Technology (FST)</strong> takes this further in premium shock lines, automatically adjusting damping based on bump frequency for an intelligent, adaptive ride.</p><p>Their <a href="/823-progressive-suspension-shock-absorber-7556">shock absorber lineup</a> 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.</p><h3>Complete Suspension Solutions</h3><p>Progressive Suspension doesn't stop at rear shocks. Their <a href="/823-progressive-suspension-suspension-kit-201515">suspension kit offerings</a> 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.</p><p>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.</p><h3>A Legacy Built on Ride Quality</h3><p>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.</p>