{"product_id":"progressive-412-shocks-harley-davidson-63","title":"Progressive 412 Shocks — Harley-Davidson","description":"\u003cp\u003eProgressive 412 Series shocks deliver consistent damping performance for Harley-Davidson motorcycles through a durable double-wall steel design. High-pressure nitrogen charging and multi-stage velocity-sensitive valving provide smooth suspension feel across road conditions, while a five-position preload adjuster lets you tune for your weight and riding style.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-wall steel damper body\u003c\/li\u003e\n  \u003cli\u003eHigh-pressure nitrogen gas charged\u003c\/li\u003e\n  \u003cli\u003eMulti-stage velocity-sensitive damping\u003c\/li\u003e\n  \u003cli\u003e5-position cam-style preload adjuster\u003c\/li\u003e\n  \u003cli\u003eStandard or Heavy-Duty progressive rate spring options\u003c\/li\u003e\n  \u003cli\u003eChrome or black finish available\u003c\/li\u003e\n  \u003cli\u003eOptional Show Chrome covers on select models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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 412-4008C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.3 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Suspension \/ Shocks and Struts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Harley-Davidson\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product contains chemicals known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson motorcycles. Check fitment notes for your specific model year and application before ordering.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eHow do I adjust the preload on these shocks?\u003c\/h3\u003e\n\u003cp\u003eThe 5-position cam-style adjuster lets you dial preload up or down. Clockwise increases preload for heavier riders; counterclockwise decreases it for lighter weight.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between Standard and Heavy-Duty springs?\u003c\/h3\u003e\n\u003cp\u003eHeavy-Duty springs carry more load and suit heavier riders or two-up duty. Standard springs work best for solo and light-rider applications.\u003c\/p\u003e\n\u003ch3\u003eWhy are they nitrogen charged?\u003c\/h3\u003e\n\u003cp\u003eNitrogen gas prevents damping fluid foaming under heat and compression, maintaining consistent shock performance across temperature and riding intensity.\u003c\/p\u003e\n\u003ch3\u003eCan I get these with Show Chrome covers?\u003c\/h3\u003e\n\u003cp\u003eYes — Select models offer optional full Show Chrome covers. Verify your Harley model is available for chrome cover fitment.\u003c\/p\u003e\n\u003ch2\u003eCalifornia Proposition 65 Warning\u003c\/h2\u003e\n\u003cp style=\"font-size:11px;color:#888;\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov\u003c\/p\u003e","brand":"Progressive","offers":[{"title":"Default Title","offer_id":53040155885679,"sku":"T14-669139","price":379.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_0c3fbdb1-4826-4e42-a63a-0e2bfcbb50d9.png?v=1779565622","url":"https:\/\/vtwinbikers.com\/products\/progressive-412-shocks-harley-davidson-63","provider":"Vtwinbikers","version":"1.0","type":"link"}