{"product_id":"progressive-fork-cartridge-kits-harley-davidson-softail-lowered","title":"Progressive Fork Cartridge Kit - 2017+ Harley Softail 49mm Forks","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Progressive\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eProgressive Suspension has focused exclusively on American V-twin suspension since 1982, and its Monotube fork cartridges and 400\/970\/970G shock series are among the most common upgrades on baggers and Softails. For most riders the stock rear shock is the single worst part on the bike — this is the fix.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eThis Progressive Fork Cartridge Kit is engineered specifically for 2017 and newer Harley-Davidson Softail models equipped with 49mm front ends. It's designed to revolutionize your bike's handling, featuring adjustable preload, progressive-rate springs, and advanced Frequency Sensing Technology (FST) damping. Riders will immediately notice reduced brake dive and significantly improved cornering grip.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eDesigned for 2017+ Harley Softail with 49mm forks\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eAdjustable preload for fine-tuned suspension\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eFrequency Sensing Technology (FST) damping\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eEliminates front-end brake dive\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eImproves cornering stability and grip\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eOffers 1-inch or 2-inch lowering options\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe new generation of Harley-Davidson Softail models offers a great platform for performance upgrades, and the front suspension is a key area. This Progressive Fork Cartridge Kit unlocks the full potential of your 49mm front end, transforming a capable bike into a truly dynamic machine. The combination of progressive-rate springs and FST damping delivers a controlled, responsive ride that excels in aggressive cornering and everyday cruising alike.\u003c\/p\u003e\u003ch3\u003eAdvanced Softail Suspension\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFeatures adjustable preload for fine-tuning spring tension\u003c\/li\u003e\n\u003cli\u003eAsymmetrical design with Frequency Sensing Technology (FST) damping\u003c\/li\u003e\n\u003cli\u003eEffectively eliminates front-end brake dive\u003c\/li\u003e\n\u003cli\u003eDramatically improves cornering stability and grip\u003c\/li\u003e\n\u003cli\u003eEnhanced resistance to bottoming out\u003c\/li\u003e\n\u003cli\u003eInstalls with options for 1-inch or 2-inch lowering drop\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCustomizable Ride Height and Performance\u003c\/h3\u003e\u003cp\u003eBeyond its superior damping capabilities, this kit offers practical customization for your Softail. You can choose to install the cartridges in either a 1-inch or 2-inch lowered configuration, allowing you to achieve your desired ride height and stance. This versatility, combined with the performance benefits, makes it an ideal upgrade for Softail riders who demand both aggressive handling and a personalized look.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Progressive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 31-4009\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Suspension \/ Fork Cartridge Kits\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Harley-Davidson Softail Lowered 2017+\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e California Prop 65 — Cancer and Reproductive Harm. www.P65Warnings.ca.gov\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eDoes this kit come with lowering options?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eYes, this Progressive fork cartridge kit can be installed in either a 1-inch or 2-inch lowering configuration to achieve your desired ride height.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWill this fit my older Softail with 39mm forks?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, this kit is specifically designed for 2017 and newer Harley-Davidson Softail models equipped with 49mm fork tubes. It will not fit models with 39mm forks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat is Frequency Sensing Technology (FST)?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eFST damping is an advanced technology that allows the damping to react differently based on the speed and frequency of fork movement, providing a smoother ride over small bumps and firmer control during hard compression.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Fork Cartridge Kits\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Progressive\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/progressive\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Progressive Fork Cartridge Kit - 2017+ Harley Softail 49mm Forks\",\"item\":\"https:\/\/vtwinbikers.com\/products\/progressive-fork-cartridge-kits-harley-davidson-softail-lowered\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does this kit come with lowering options?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, this Progressive fork cartridge kit can be installed in either a 1-inch or 2-inch lowering configuration to achieve your desired ride height.\"}},{\"@type\":\"Question\",\"name\":\"Will this fit my older Softail with 39mm forks?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, this kit is specifically designed for 2017 and newer Harley-Davidson Softail models equipped with 49mm fork tubes. It will not fit models with 39mm forks.\"}},{\"@type\":\"Question\",\"name\":\"What is Frequency Sensing Technology (FST)?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"FST damping is an advanced technology that allows the damping to react differently based on the speed and frequency of fork movement, providing a smoother ride over small bumps and firmer control during hard compression.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Progressive","offers":[{"title":"Default Title","offer_id":53040366911599,"sku":"T14-669281","price":687.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_7793e046-5447-4d70-97e6-f77f67ae1f36.png?v=1779566466","url":"https:\/\/vtwinbikers.com\/products\/progressive-fork-cartridge-kits-harley-davidson-softail-lowered","provider":"Vtwinbikers","version":"1.0","type":"link"}