{"title":"Gravel Grinder","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Gravel Grinder is our original and often-imitated fast gravel design. It combines a speedy diamond center for low rolling resistance with aggressive shoulder knobs that reliably hook-up when the terrain gets soft, muddy or a bit sketchy. \u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"gravel-grinder-pro-handmade-tlr","title":"GRAVEL GRINDER Pro - Handmade TLR","description":"\u003cp\u003e\u003cstrong\u003eMulti-Purpose with Bite\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGravel Grinder is for cruising at speed and cornering with more confidence in soft and wet conditions. The diamond center tread clears dirt and mud and grips grass and sand while the wide-spaced side knobs hook soft ground for traction and help guide the tire through ruts. The mixed tread offers solid rolling resistance with a bit more cornering grip.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThis handmade PRO version combines a supple Super Polyester casing with our durable SmartPlus Compound. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThis Challenge TLR model is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehookless rim compatible.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003eFor perfect tubeless setup use \u003ca title=\"Challenge Smart Tubeless Sealant\" href=\"https:\/\/challenge-tires-usa.myshopify.com\/products\/smart-tubeless-sealant\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eChallenge Smart Tubeless Sealant\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0852\/2930\/6155\/files\/BugRow_Gravel_240x240.png?v=1730129484\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e","brand":"Challenge Tires","offers":[{"title":"700x33C \/ Tan","offer_id":53009829626179,"sku":"00537","price":79.9,"currency_code":"EUR","in_stock":true},{"title":"700x36C \/ Tan","offer_id":53009829658947,"sku":"00532","price":55.93,"currency_code":"EUR","in_stock":true},{"title":"700x40C \/ Tan","offer_id":53009829691715,"sku":"00534","price":79.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6068\/3331\/files\/GRAVEL-GRINDER-HTLR-40-Tan.jpg?v=1744856198"},{"product_id":"gravel-grinder-pro-handmade-clincher","title":"GRAVEL GRINDER Pro - Handmade Clincher","description":"\u003cp\u003e\u003cstrong\u003eMulti-Purpose with Bite\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGravel Grinder is for cruising at speed and cornering with more confidence in soft and wet conditions. The diamond center tread clears dirt and mud and grips grass and sand while the wide-spaced side knobs hook soft ground for traction and help guide the tire through ruts. The mixed tread offers solid rolling resistance with a bit more cornering grip.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThis handmade PRO version combines a supple Super Polyester casing with our durable SmartPlus Compound. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eChallenge clincher tires are designed for use with tubes and hooked rims.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0852\/2930\/6155\/files\/BugRow_Gravel_240x240.png?v=1730129484\"\u003e\u003c\/div\u003e","brand":"Challenge Tires","offers":[{"title":"700x33C \/ Tan","offer_id":53009829888323,"sku":"00535","price":64.9,"currency_code":"EUR","in_stock":true},{"title":"700x36C \/ Tan","offer_id":53009829921091,"sku":"00530","price":45.45,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6068\/3331\/files\/GRAVEL-GRINDER-Pro-HCL-33-Tan.jpg?v=1744856209"},{"product_id":"gravel-grinder-clincher","title":"GRAVEL GRINDER - Vulcanized Clincher","description":"\u003cp\u003e\u003cstrong\u003eMulti-Purpose with Bite\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGravel Grinder is for cruising at speed and cornering with more confidence in soft and wet conditions. The diamond center tread clears dirt and mud and grips grass and sand while the wide-spaced side knobs hook soft ground for traction and help guide the tire through ruts. The mixed tread offers solid rolling resistance with a bit more cornering grip.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eWith our \u003cmeta charset=\"utf-8\"\u003evulcanized construction, we start where other tires stop - we utilize ultralight 60TPI nylon casings and superior tread compounds - to give our traditional vulcanized tires excellent ride feel and quality that is more affordable than our handmade offerings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eChallenge clincher tires are designed for use with tubes and hooked rims.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0852\/2930\/6155\/files\/BugRow_Vul_CXRD_160x160.png?v=1730139838\"\u003e\u003c\/div\u003e","brand":"Challenge Tires","offers":[{"title":"700x38C \/ Black","offer_id":53009830871363,"sku":"01938","price":44.9,"currency_code":"EUR","in_stock":false},{"title":"700x42C \/ Black","offer_id":53009830904131,"sku":"01941","price":44.9,"currency_code":"EUR","in_stock":true},{"title":"700x42C \/ Brown","offer_id":53774979957059,"sku":"01943","price":35.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6068\/3331\/files\/GRAVEL-GRINDER-VCL-38-Black.jpg?v=1744856270"},{"product_id":"gravel-grinder-tlr","title":"GRAVEL GRINDER - Vulcanized TLR","description":"\u003cp\u003e\u003cstrong\u003eMulti-Purpose with Bite\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGravel Grinder is for cruising at speed and cornering with more confidence in soft and wet conditions. The diamond center tread clears dirt and mud and grips grass and sand while the wide-spaced side knobs hook soft ground for traction and help guide the tire through ruts. The mixed tread offers solid rolling resistance with a bit more cornering grip.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWith our \u003cmeta charset=\"utf-8\"\u003evulcanized construction, we start where other tires stop - we utilize ultralight 60TPI nylon casings and superior tread compounds - to give our traditional vulcanized tires excellent ride feel and quality that is more affordable than our handmade offerings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThis Challenge TLR model is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehooked rim compatible.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003eFor perfect tubeless setup use \u003ca title=\"Challenge Smart Tubeless Sealant\" href=\"https:\/\/challenge-tires-usa.myshopify.com\/products\/smart-tubeless-sealant\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eChallenge Smart Tubeless Sealant\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0852\/2930\/6155\/files\/BugRow_Vul_CXRD_160x160.png?v=1730139838\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/b\u003e\u003c\/p\u003e","brand":"Challenge Tires","offers":[{"title":"700x33C \/ Brown","offer_id":53009831690563,"sku":"02049","price":57.9,"currency_code":"EUR","in_stock":true},{"title":"700x33C \/ Black","offer_id":53009831723331,"sku":"02044","price":57.9,"currency_code":"EUR","in_stock":true},{"title":"700x38C \/ Brown","offer_id":53009831756099,"sku":"02009","price":57.9,"currency_code":"EUR","in_stock":true},{"title":"700x38C \/ Black","offer_id":53009831788867,"sku":"02004","price":57.9,"currency_code":"EUR","in_stock":false},{"title":"700x42C \/ Black","offer_id":53009831821635,"sku":"02014","price":57.9,"currency_code":"EUR","in_stock":true},{"title":"650x46C \/ Brown","offer_id":53479338017091,"sku":"02029","price":57.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6068\/3331\/files\/GRAVEL-GRINDER-VTLR-33-Black.jpg?v=1744856292"},{"product_id":"gravel-grinder-pro-handmade-tubeless-tubular","title":"GRAVEL GRINDER Pro - Handmade Tubeless Tubular","description":"\u003cp\u003e\u003cstrong\u003eMulti-Purpose with Bite\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGravel Grinder is for cruising at speed and cornering with more confidence in soft and wet conditions. The diamond center tread clears dirt and mud and grips grass and sand while the wide-spaced side knobs hook soft ground for traction and help guide the tire through ruts. The mixed tread offers solid rolling resistance with a bit more cornering grip.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis handmade PRO version combines a supple, 260TPI Super Polyester casing with our durable SmartPlus Compound\u003cmeta charset=\"utf-8\"\u003e tread and a Latex Inner Tube with 48mm valve stem.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e\u003cstrong\u003eA tubeless tubular is glued to the rim just like a regular tubular\u003c\/strong\u003e and from the outside there is no way to detect a difference, but an interior coating makes sewing an inner tube inside the tire unnecessary. This \"tubular without a tube\" offers next-level protection from pinch flats or punctures when combined with\u003c\/span\u003e \u003ca title=\"Challenge Smart Tubeless Sealant\" href=\"https:\/\/challenge-tires-usa.myshopify.com\/products\/smart-tubeless-sealant\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eChallenge Smart Tubeless Sealant\u003c\/span\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0852\/2930\/6155\/files\/BugRow_Gravel_240x240.png?v=1730129484\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e","brand":"Challenge Tires","offers":[{"title":"700x33C \/ Tan","offer_id":53009839685955,"sku":"10670","price":49.95,"currency_code":"EUR","in_stock":true},{"title":"700x36C \/ Tan","offer_id":53479299612995,"sku":"10675","price":99.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6068\/3331\/files\/GRAVEL-GRINDER-Pro-HTLTU-36-Tan.jpg?v=1753460615"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/6068\/3331\/collections\/Product_banner_template5.jpg?v=1744856675","url":"https:\/\/challengetires.com\/collections\/gravel-grinder.oembed","provider":"Challenge Tires","version":"1.0","type":"link"}