{"product_id":"spitfire-april-bighead-rose-f4-radial-56mm-99a-wheels","title":"SPITFIRE FORMULA FOUR APRIL BIGHEAD ROSE SWIRL RADIAL 56MM 99D (Set of 4)","description":"\u003cp dir=\"ltr\"\u003eThe Spitfire x April \"Bighead Rose\" wheels bring April Skateboards styling to Spitfire's industry-leading Formula Four urethane. This official collaboration combines Spitfire's iconic Bighead identity with an exclusive rose graphic treatment, finished in a standout marbled swirl colorway that no two sets wear exactly alike. Formula Four is the pro standard for a reason: more speed and control on every surface, unmatched flat-spot resistance, a smooth anti-stick slide, and a high-rebound compound that keeps its shape and speed session after session. Every set is hand-poured and engineered in San Francisco, CA.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eAt 56mm, these run the Radial shape — rounded sidewalls with a generous riding surface for a stable, locked-in feel and confident control across street and park. The bump up to 56mm adds roll speed and momentum, so they carry through rough or imperfect ground better than smaller street diameters without moving into an oversized setup. The 99a durometer is the versatile sweet spot: fast and slidey like a harder wheel, but forgiving enough for everyday terrain. Sold as a set of four.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003eDiameter: 56mm (35mm width, 21.5mm riding surface)\u003c\/li\u003e\n\u003cli\u003eDurometer: 99a (marked \"99D\" in Spitfire's branding)\u003c\/li\u003e\n\u003cli\u003eShape: Radial (rounded sidewalls, generous riding surface)\u003c\/li\u003e\n\u003cli\u003eFormula: Spitfire Formula Four (F4)\u003c\/li\u003e\n\u003cli\u003eColorway: Marbled swirl\u003c\/li\u003e\n\u003cli\u003eGraphic: \"Bighead Rose\" (Spitfire x April collab)\u003c\/li\u003e\n\u003cli\u003eMade in: USA (hand-poured, San Francisco)\u003c\/li\u003e\n\u003cli\u003eTerrain: Street \/ park \/ all-terrain\u003c\/li\u003e\n\u003cli\u003eBrand: Spitfire Wheels\u003c\/li\u003e\n\u003cli\u003eSold as: Set of 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003eNeed bearings, trucks, or hardware to finish a build? Grab them at checkout, or ask us in-store and we'll set you up.\u003c\/p\u003e","brand":"Stamford Skate Shop","offers":[{"title":"Default Title","offer_id":46500466163848,"sku":null,"price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0657\/7825\/3960\/files\/Screenshot2026-09-08at4.32.52PM.png?v=1788903427","url":"https:\/\/stamfordskateshop.com\/products\/spitfire-april-bighead-rose-f4-radial-56mm-99a-wheels","provider":"Stamford Skate Shop","version":"1.0","type":"link"}