{"product_id":"formula-four-99-duro-classics-51mm","title":"Formula Four 99 Duro Classics Skate Wheels - 51MM","description":"\u003cdiv\u003eThe Spitfire Formula Four 99D 51mm wheels are high-performance skateboard wheels known for a balanced 99a hardness that provides a smooth slide with controllable grip.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"text-decoration: underline;\"\u003eKey Specifications \u0026amp; Features\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003eSize: 51mm diameter, making them a smaller, lighter choice favored for quick flip tricks and technical street or park skating.\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eDurometer: 99D (99a hardness), offering slightly more give and grip on slick surfaces than harder 101a wheels while still sliding smoothly.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eUrethane: Built with anti-abrasion Spitfire Formula Four compound that resists flat spots.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Spitfire","offers":[{"title":"Default Title","offer_id":44513801175143,"sku":"WHEELS-SPIT-F4-99A-51MM","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/7260\/5799\/files\/sf-cp-f4-99-classics-51mm-front.webp?v=1787844612","url":"https:\/\/enter-darkroom.com\/products\/formula-four-99-duro-classics-51mm","provider":"DARKROOM","version":"1.0","type":"link"}