Rear Shock Absorber - HD 357

Item Summary Type: S36HR1C1L Lenght: 336+0/-10 Stroke: 90.5 Fitted Spring: 00281-68 (B) Well proven monotube design Emulsion, piggyback or hose type gas pressurized system Each application tested and tailor made to suit Designed for comfort and rideability on cruisers Designed to sporty riding on sport oriented bikes Wide range of spring rates are available Optional black, yellow and chrome springs are available to most models About the Product hlins STX 36 Twin Remote Reservoir Rear Shock Set HD 357 Motor Officer Special for Harley-Davidson FLH & FLT Touring Models (19902013) Product Overview The hlins HD 357 STX 36 Twin Shock Set, commonly known as the "Motor Officer Special," is the ultimate rear suspension upgrade for Harley-Davidson Touring motorcycles. Originally developed to meet the demanding requirements of law enforcement motorcycles that operate under heavy loads and continuous use, the HD 357 combines exceptional durability with race-proven suspension technology to deliver unmatched comfort, stability, and handling. Designed specifically for Harley-Davidson FLH and FLT Touring models from 1990 through 2013, the HD 357 features remote hose-mounted reservoirs, fully independent compression and rebound damping adjustment, ride height adjustment, and spring preload adjustment, providing an extensive range of tuning options for solo riders, two-up touring, and fully loaded long-distance travel. For riders seeking the highest level of suspension performance available for a Harley-Davidson Touring platform, the HD 357 represents the flagship solution in the hlins American V-Twin lineup. Key Features Genuine hlins STX 36 Twin Rear Shock Set hlins Part Number: HD 357 Type Code: S36HR1C1L Developed as the Motor Officer Special Designed for Harley-Davidson FLH & FLT Touring models 337.5 mm (13.3") length with adjustable ride height (+0/-10 mm) STX monotube design with external hose-mounted reservoirs 36 mm piston diameter Adjustable rebound damping Adjustable compression damping Adjustable ride height Adjustable spring preload High-pressure nitrogen gas charged Hard-anodized CNC-machined aluminum construction Fully rebuildable and serviceable Sold as a pair Manufactured in Sweden Developed for Demanding Touring Applications The HD 357 was engineered for motorcycles that spend long hours on the road carrying substantial loads while maintaining precise handling and rider comfort. Its advanced hydraulic system provides outstanding performance for: Long-distance touring Two-up riding Heavy luggage loads Performance bagger builds Aggressive canyon riding High-mileage applications The large oil capacity provided by the remote reservoirs maintains stable operating temperatures and consistent damping characteristics even during prolonged use. STX 36 Single Tube Technology The HD 357 utilizes hlins' renowned STX (Single Tube Technology) suspension architecture. Its 36 mm piston operates within a high-pressure gas-charged monotube body that separates hydraulic oil from nitrogen gas, minimizing cavitation and maintaining highly consistent damping performance. Benefits include: Superior wheel control Reduced damping fade Increased rear tire traction Improved ride quality Enhanced chassis stability Better heat management More predictable suspension response The STX design provides exceptional sensitivity to small road imperfections while delivering excellent support under heavy acceleration, braking, and cornering. Remote Reservoir System The external hose-mounted reservoirs significantly increase oil volume and improve thermal stability. Advantages include: Greater resistance to heat-induced damping fade Improved consistency during extended riding Enhanced hydraulic precision Increased suspension longevity Better control under heavy loads This configuration is ideal for riders who demand maximum suspension performance under all operating conditions. Fully Adjustable Performance Adjustable Rebound Damping External rebound adjustment controls suspension extension speed after compression, improving: Rear wheel traction Corner exit stability Chassis control Rider confidence High-speed composure Adjustable Compression Damping Independent compression adjustment allows fine tuning of impact absorption and chassis support. Benefits include: Improved bump absorption Reduced brake dive Better passenger comfort Enhanced cornering stability Optimized suspension support under heavy loads Adjustable Ride Height Ride height adjustment allows customization of chassis geometry without altering suspension travel. Benefits include: Faster steering response Increased lean angle clearance Improved weight distribution Personalized ergonomics Optimized handling characteristics Adjustable Spring Preload Mechanical preload adjustment allows proper rider sag setup based on rider weight and payload. Correct preload contributes to: Balanced chassis geometry Better braking stability Improved steering precision Enhanced cornering confidence Maximum suspension effectiveness Premium Construction Every HD 357 shock incorporates premium materials and precision manufacturing developed through decades of championship-winning motorsport experience. Construction highlights include: CNC-machined aluminum bodies Hard-anodized corrosion-resistant finish Precision-ground piston rods Low-friction shaft and seal head design High-pressure nitrogen charging Precision shim-stack valving Premium hlins suspension oil Replaceable internal wear components The fully rebuildable architecture allows complete servicing and re-valving, making the HD 357 a long-term investment rather than a disposable suspension component. Technical Specifications Specification Details Manufacturer hlins Racing Part Number HD 357 Type Code S36HR1C1L Shock Type STX 36 Monotube Reservoir External Hose-Mounted Piston Diameter 36 mm Length 337.5 mm (+0/-10 mm adjustable) Stroke 90.5 mm Spring Rate 25 N/mm Mounted Spring 00281-68 / 66422-026 Rebound Adjustment Yes Compression Adjustment Yes Ride Height Adjustment Yes Spring Preload Adjustment Yes Serviceable Fully Rebuildable Packaging Pair Fitment Compatible with a wide range of Harley-Davidson Touring models (19902013), including: Electra Glide Electra Glide Classic Electra Glide Ultra Classic Road King Road King Classic Road Glide Road Glide Custom Road Glide Ultra Street Glide Ultra Classic Electra Glide Designed for motorcycles utilizing the 337.5 mm (13.3-inch) rear shock configuration. Always verify your OEM shock length and application before ordering. Installation The HD 357 installs directly using factory mounting points and is supplied as a complete pair. Professional installation and suspension setup are recommended to ensure: Correct rider sag Proper preload adjustment Optimized rebound settings Optimized compression settings Balanced chassis geometry Maximum suspension performance Fine tuning allows the suspension to be tailored for solo riding, two-up touring, or fully loaded cross-country travel. Service and Maintenance Like all premium hlins products, the HD 357 is fully rebuildable and designed for decades of service. Periodic maintenance replaces hydraulic oil, seals, and wear components, restoring factory-level performance and extending service life. Routine servicing ensures: Consistent damping characteristics Long-term reliability Maximum ride quality Protection of your suspension investment Why Choose hlins? For nearly 50 years, hlins Racing has established itself as one of the world's premier suspension manufacturers, earning championships across MotoGP, World Superbike, Motocross, Endurance Racing, and numerous international racing disciplines. The HD 357 Motor Officer Special represents the pinnacle of hlins' American V-Twin suspension development, offering unmatched adjustability, exceptional comfort, and race-derived performance for Harley-Davidson Touring motorcycles. Whether you're covering thousands of highway miles, riding two-up with luggage, or building a high-performance bagger, the HD 357 delivers the precision, control, and confidence that define the hlins name.