{"product_id":"f4-99d-conical-full-54","title":"Spitfire Formula Four 99D Conical Full 54mm Skateboard Wheels","description":"\u003cp\u003e\u003cstrong\u003eSpitfire Formula Four 99D Conical Full 54mm — Precision-poured urethane for technical street skating.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Formula Four 99D Conical Full 54mm delivers Spitfire's legendary Formula Four urethane in a 99D hardness — the choice for slick, fast terrain and technical ledge work. The conical full shape provides a wider riding surface for flat-ground stability while shedding weight at the inner edge for a more responsive feel. Poured in-house at Spitfire's San Francisco facility, these wheels hold their shape and resist flatspotting through repeated heavy use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFormula Four Urethane:\u003c\/strong\u003e Spitfire's proprietary compound — no flatspotting, no chunking, consistent speed on smooth surfaces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 99D — firm and fast, ideal for skate parks, marble ledges, and sealed concrete\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 54mm — versatile mid-size suited to street and park setups\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Conical Full — broad contact patch for flat-ground control, relieved inner edge for grip transitions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in the USA\u003c\/strong\u003e at Spitfire's SF facility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAt 99D, these roll fast and stay true session after session — whether you're grinding granite curbs or lacing tricks on a polished skatepark floor. The 54mm diameter keeps your setup agile without sacrificing roll speed across gaps and flatground.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSetup Guide:\u003c\/strong\u003e Sold as a set of 4. Compatible with standard 8mm axle hardware. Pair with bearings sold separately. Best suited for riders on medium-to-stiff decks who prioritize speed and slide consistency.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCare:\u003c\/strong\u003e Rinse with water after skating in wet or gritty conditions. Rotate wheels periodically for even wear.\u003c\/p\u003e","brand":"SPITFIRE","offers":[{"title":"Default Title","offer_id":46727984382101,"sku":"2111001254","price":50.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/4001\/1157\/files\/mir7xigl0qftylzm1mml.png?v=1765234202","url":"https:\/\/revosurf.com\/products\/f4-99d-conical-full-54","provider":"REVOLUTION","version":"1.0","type":"link"}