{"product_id":"spitfire-formula-four-conical-53mm-99d-set-of-4","title":"SPITFIRE FORMULA FOUR CONICAL 53MM 99D (Set of 4)","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eSpitfire Formula Four Conical 53mm 99D — Set of 4\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe street skater's sweet spot. The Formula Four Conical in 53mm 99D is the go-to setup for skaters who want all the benefits of F4 urethane but need a little more grip and forgiveness on real-world terrain. Slightly softer than the 101D, built for everywhere — not just perfect skateparks.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBuilt with Spitfire's Formula Four Urethane, these wheels feature a smooth riding surface in a medium profile maximizing traction for precise carving. Unmatched abrasion resistance means fewer flat spots, more controllable grip, lasting speed no matter the terrain, and a smooth anti-slick slide with a longer lasting size and shape. At 99D, you get a perfect mix of firmness and rebound for less-than-perfect surfaces — fast enough for technical skating, grippy enough to handle rougher spots without losing control. The Conical shape keeps weight down and response up, making 53mm the ideal all-around size for street and park alike. Sold as a set of 4.\u003cspan class=\"inline-flex\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDiameter: 53mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWidth: 33.5mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRiding Surface: 21.5mm\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDurometer: 99D\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eShape: Conical\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProfile: Medium\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSurface: Smooth\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUrethane: Formula Four\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSold as a set of 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eGrab a set at \u003cstrong\u003eStamford Skate Shop\u003c\/strong\u003e — Stamford, CT's local skate shop for Spitfire Formula Four wheels, pro decks, trucks, and everything you need to skate. In-store and online.\u003c\/p\u003e","brand":"Stamford Skate Shop","offers":[{"title":"Default Title","offer_id":46124378325128,"sku":null,"price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0657\/7825\/3960\/files\/Screenshot2026-06-18at4.36.38PM.png?v=1781815025","url":"https:\/\/stamfordskateshop.com\/products\/spitfire-formula-four-conical-53mm-99d-set-of-4","provider":"Stamford Skate Shop","version":"1.0","type":"link"}