Frame & Suspension

Progressive Suspension #31-4004 - Monotube Cartridge Fork Kit - 49 mm - Standard

Right main bearing outer race. Hardened steel outer bearing race for use in 1936-1999 big twin and S&S KN, P, SH and V-Series motors. One required, sold each. FitmentYear(s)MakeModel CodeModel1958-1999Harley-Davidson—Big Twin

Progressive Suspension #31-4005 - Monotube Cartridge Fork Kit - 49 mm - Lowering

Monotube Cartridge Fork Kit - 49 mm - LoweringFeaturesConverts dual damper rod forks to high-performance cartridge forksContains high-performance, gas-charged monotube fork cartridges and custom-tuned fork springsImproves resistance to front brake dive,...

Progressive Suspension #31-4006 - Monotube Cartridge Fork Kit - 49 mm - Standard

Monotube Cartridge Fork Kit - 49 mm - StandardFeaturesConverts dual damper rod forks to high-performance cartridge forksContains high-performance, gas-charged monotube fork cartridges and custom-tuned fork springsImproves resistance to front brake dive,...

Progressive Suspension #31-4007 - Monotube Cartridge Fork Kit - 49 mm - Lowering

Monotube Cartridge Fork Kit - 49 mm - LoweringFeaturesConverts dual damper rod forks to high-performance cartridge forksContains high-performance, gas-charged monotube fork cartridges and custom-tuned fork springsImproves resistance to front brake dive,...

Progressive Suspension #31-4008 - Monotube Cartridge Fork Kit - Standard

Features road-smoothing Frequency Sensing Technology (FST) damper for improved resistance to front brake dive, front-end stability and corner.FeaturesConverts dual damper rod forks to high-performance cartridge forksContains high-performance, gas-charged...

Progressive Suspension #31-4009 - Monotube Cartridge Fork Kit - Lowered 1”-2”

Features road-smoothing Frequency Sensing Technology (FST) damper for improved resistance to front brake dive, front-end stability and corner.FeaturesConverts dual damper rod forks to high-performance cartridge forksContains high-performance, gas-charged...

Progressive Suspension #31-4010 - Monotube Fork Cartridge Kit - +2"

Monotube Fork Kit Replaces all OEM fork internals 2” Over Stock Ride Height Without Changing Fork Tubes Frequency Sensing Technology (FST) Damper Improved Resistance to brake dive Improved front end stability and cornering Improved bottoming control

Progressive Suspension #31-4011 - Monotube Fork Cartridge Kit - +2"

Monotube Fork Cartridge Kit - +2"FeaturesReplaces all OEM fork internals2” Over Stock Ride Height Without Changing Fork TubesFrequency Sensing Technology (FST) DamperImproved Resistance to brake diveImproved front end stability and corneringImproved...

Progressive Suspension #31-5056 - Fork Preload Adjuster - 49 mm - Black Anodized

Fork Preload Adjuster - 49 mm - Black AnodizedFeaturesGreat thread-in solution to improve front suspension performanceAdd preload to stiffen up the front fork for aggressive riding in the canyonsDecrease preload to soften the suspension for a day of...

Progressive Suspension #32-5508 - Spring Tool - PSI Shocks - Standard

Spring Tool - PSI Shocks - StandardFeaturesDesigned to take the hassle of removing shock springsEasy to useFits most springs on twin-shock motorcycles.SpecsColor/FinishBlackRiding StyleWatercraftTypePSI ShocksUnitsEachMaterialSteelStyleStandardProduct...

Progressive Suspension #412-4001B - 412 Series Shock - 12.5" - Standard - Black - H-D

412 Series Shock - 12.5" - Standard - Black - H-DFeaturesDesigned specifically for Harley modelsThe 412's simple, durable design makes them a cost effective improvement to your motorcycle's suspension performanceA five position cam style spring load...

Progressive Suspension #412-4001C - 412 Series Shock - 12.5" - Standard - Chrome - H-D

412 Series Shock - 12.5" - Standard - Chrome - H-DFeaturesDesigned specifically for Harley modelsThe 412's simple, durable design makes them a cost effective improvement to your motorcycle's suspension performanceA five position cam style spring...

Progressive Suspension #412-4002B - 412 Series Shock - 13" - Standard - Black - H-D

• Standard for Harley-Davidson FLT/FLHT/FLHR/FLTR '84-'05.• Heavy duty for Harley-Davidson FXR '87-'94.• Heavy duty for Harley-Davidson XL '86-'03.FeaturesDesigned specifically for Harley modelsThe 412's simple, durable design makes them a cost effective...

Progressive Suspension #412-4002C - 412 Series Shock - 13" - Standard - Chrome - H-D

412 Series Shock - 13" - Standard - Chrome - H-DFeaturesDesigned specifically for Harley modelsThe 412's simple, durable design makes them a cost effective improvement to your motorcycle's suspension performanceA five position cam style spring load...

Progressive Suspension #412-4003B - 412 Series Shock - 13.5" - Standard - Black - H-D

• Standard for Harley-Davidson FLT/FLHT/FLHR/FLTR '84-'05.• Heavy duty for Harley-Davidson FXR '87-'94.• Heavy duty for Harley-Davidson XL '86-'03.FeaturesDesigned specifically for Harley modelsThe 412's simple, durable design makes them a cost effective...