Street Bike Shock Springs/Spring Kits

If your suspension feels inconsistent on the track or trail, your shocks are likely fading under sustained load—a common problem that Progressive's 12-Series shocks eliminate entirely. Gas-charged damping and six-stage automatic valving keep your bike...

If you're running your cruiser or touring bike at or near maximum load capacity, stock shocks simply won't cut it. The Progressive 412 Cruiser Series delivers the damping control and support your bike demands, with velocity-sensitive valving that...

If you're running a cruiser or touring bike at or near its load capacity, factory shocks simply won't cut it. Progressive's 412 Cruiser Series delivers the control and comfort you need through nitrogen-charged, velocity-sensitive technology that...

If you're running your cruiser hard and carrying substantial load, stock shocks won't cut it. The Progressive 412 Cruiser Series delivers nitrogen-charged damping that automatically adapts to real-world riding conditions, keeping your bike planted...

Progressive's 12-Series shock springs deliver consistent, fade-free damping performance across varied riding conditions through gas-charged construction and six-stage automatic damping. Whether you're carrying extra weight, frequent passengers, or loaded...

If you're running heavier loads or carrying passengers, your stock shock spring is working overtime—and your ride quality suffers. The BARON Performance Shock Spring (800 lbs/in) restores proper damping control and eliminates the bounce and wallowing...

If you're running heavier loads or carrying passengers, your stock shock spring is working overtime—and it shows in every corner and bump. The BARON Performance Shock Spring (930 lbs/in) restores proper damping control and eliminates the wallowing bounce...

Progressive's 12-Series shock springs deliver consistent, fade-free damping through gas-charged construction and six-stage automatic damping—critical for maintaining predictable handling across varying terrain and conditions. The heavy-duty 120-170 lb/in...

12 series shocks are gas-charged for superior, fade-free damping and consistent operation, Six-stage, automatic damping - designed with a special anti-topping function, Double-wall shock body construction for piston protection and long life, Standard...

A properly fitted shock collar adapter is essential for maintaining precise suspension geometry and ensuring your rear shock absorbs impact forces exactly as engineered. This RACE TECH adapter eliminates play and misalignment that can degrade damping...

A properly fitted shock collar adapter is critical for maintaining consistent suspension geometry and preventing component wear during high-performance driving. The RACE TECH Shock Collar Adapter SPSC P564916 ensures precise mounting of your rear shock,...

A properly fitted shock collar adapter is critical for maintaining consistent suspension geometry and preventing unwanted movement during high-load cornering and braking events. The RACE TECH Shock Collar Adapter SPSC P575012 delivers a...

A properly fitted shock collar adapter is essential for maintaining consistent damping geometry and preventing unwanted movement during hard cornering and braking. This precision-engineered adapter ensures your rear shock assembly stays secure and...

If you're upgrading your suspension geometry or installing adjustable coilovers, you need a shock collar adapter that maintains precise positioning without compromising durability. The RACE TECH Shock Collar Adapter SPSC B5855N delivers the repeatability...

If you're serious about chassis dynamics and lap times, your suspension geometry is only as good as your springs. The RACE TECH Rear Spring delivers the consistent spring rate you need to dial in your setup without the weight penalty, giving you the...

If you're serious about rear-end performance, spring rate is everything—and this 599 lbs/in RACE TECH rear spring delivers the precision damping your suspension needs to stay planted under load. Built from premium chrome silicon wire and shot-peened for...

A properly matched rear spring is foundational to chassis balance and predictable handling dynamics—especially in competitive environments where microsecond improvements matter. The RACE TECH Rear Spring delivers the precision tolerances and material...

If you're running a cruiser or touring bike near its weight capacity, OEM shocks simply won't cut it. Progressive's 412 Cruiser Series Heavy Duty shocks are engineered to handle sustained load and deliver consistent damping across the full range of...

Precision rear suspension tuning demands a spring that responds predictably under load while maintaining structural integrity through countless race cycles. The RACE TECH Rear Spring delivers the consistent 475.98 lbs/in spring rate you need for...

Precision suspension tuning demands a spring that delivers consistent, predictable performance lap after lap. The RACE TECH Rear Spring combines high-grade chrome silicon construction with shot-peening and heat treatment to maintain its spring rate...