{"product_id":"hst-4-0-flow-kit-full-truck-rebuild-kit","title":"HST 4.0 Flow Kit — Complete Truck Rebuild Kit for HST and Original Skate Trucks","description":"\u003ch1\u003eHST 4.0 Flow Kit — Full Truck Rebuild\u003c\/h1\u003e\u003ch3\u003eTen years in the making\u003c\/h3\u003e\u003cp\u003eRiders asked for more connected carving through the full lean range. Space inside the HST baseplate made traditional bushing solutions impossible. The Flow Kit solves it with a cast polyurethane compression bushing positioned \u003cem\u003einside\u003c\/em\u003e our strongest spring. \u003ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/hamboards.com\/blogs\/hst\/hst-truck-rebuild-kit-flow-kit-story\"\u003eHere's a full blog on the Flow Kit and how it evolved\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eProgressive Compression Technology (Patent Pending)\u003c\/h3\u003e\u003cp\u003eAs you lean deeper, the wave cams and hanger compress the bushing against the baseplate, producing a non-linear force curve that gets progressively stiffer with lean angle. No hard stop at maximum. Full-range carving with a cushioned transition at the extremes.\u003c\/p\u003e\u003ch3\u003eNow with the Wave Cam 4.0\u003c\/h3\u003e\u003cp\u003eOur fourth-generation wave cam — single-axis geometry, two-piece all-nylon construction, with the cam key molded integrally into the lower. FEA shows peak slot stress reduced 2.77× vs. the 2.0, and off-axis rotation is eliminated at the source. \u003ca target=\"_blank\" rel=\"noopener noreferrer\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/hamboards.com\/products\/hst-wave-cam\"\u003eRead more about the Wave Cam 4.0 →\u003c\/a\u003e\u003c\/p\u003e\u003ch3\u003eEvery component engineered\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eWave Cam 4.0\u003c\/strong\u003e — single-axis, two-piece fiber-reinforced nylon\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e85 mm precision kingpins\u003c\/strong\u003e — threaded to prevent over-tightening\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eMolybdenum-impregnated nylon washers\u003c\/strong\u003e — self-lubricating, virtually silent\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eCast polyurethane compression cone bushing\u003c\/strong\u003e — the patent-pending progressive element\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eOptimized dimensions throughout for maximum carve\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpring options\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSilver (2,700 lbf\/in)\u003c\/strong\u003e — shorter and narrower decks (under 45\"), traditional longboards. Responsive carving.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGold (3,000 lbf\/in)\u003c\/strong\u003e — longer or wider decks (45\"+). Our strongest compression springs, for aggressive riding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNo Springs\u003c\/strong\u003e — if you already have springs you love, or want to source them separately.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eIf your HST Trucks are more than five years old, new springs are strongly recommended.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eWhat's included (services two trucks)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e1 × Wave Cam 4.0 Set (both pairs — enough for two trucks)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e2 × 85 mm precision kingpins\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e2 × Molybdenum-impregnated nylon washers\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e2 × Cast polyurethane compression bushings\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e1 × Kingpin hex tool\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e1 × Wave cam lubricant packet (3 cc)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e2 × Springs (Silver or Gold configuration only)\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e100% backwards compatible with all HST Trucks and Original Skateboards S8 trucks. \u003cbr\u003e(Note Photos will be updated asap).\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eHow to Install \u0026amp; Adjust Your Wave Cams \u003c\/strong\u003e📹 \u003ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/vimeo.com\/1193438067\"\u003eHow-To Video\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e⚠️ Important: Do not over-tighten the kingpin. Especially on Original and first-generation HST Trucks with the Flow Kit, tightening the kingpin all the way down — especially with the bushing installed — can crack the wave cams, particularly in cold weather. A couple of threads showing through the locknut is enough — watch the video below for the correct technique. You may prefer to ride without the bushing entirely if you like a looser, more traditional feel.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"HST Trucks","offers":[{"title":"No Springs","offer_id":41467355660347,"sku":"3210-23-HST-FLO-80A-KIT","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Gold Springs","offer_id":41467355627579,"sku":"3210-23-HST-FLO-80A-GLD-KIT","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Silver Springs","offer_id":42522648444987,"sku":"3210-23-HST-FLO-80A-SLV-KIT","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0383\/5441\/files\/589593b7-7f7a-4250-ba1b-d97ea7daf28f.jpg?v=1777220955","url":"https:\/\/hamboards.com\/products\/hst-4-0-flow-kit-full-truck-rebuild-kit","provider":"Hamboards","version":"1.0","type":"link"}