{"product_id":"yunscm-20x4-heavy-duty-inner-tubes-pair","title":"YunSCM 20 × 4.0–4.5 Fat Bike Inner Tubes – Heavy Duty, 32mm Schrader, Pair","description":"\u003ch2\u003eYunSCM 20 × 4.0–4.5 Heavy Duty Fat Bike Inner Tubes\u003c\/h2\u003e\n\u003cp\u003eThis pair of YunSCM heavy duty inner tubes fits compatible 20 × 4.0–4.5 fat bike tyres, marked ETRTO 102\/114-406. Each tube has a straight 32mm Schrader valve (AV), for fat bicycles and e-bikes with matching tyre and rim specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePack contains two inner tubes. Tyres and wheels are not included.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy duty butyl and EPDM rubber construction.\u003c\/li\u003e\n\u003cli\u003eFits compatible 20-inch fat tyres from 4.0 to 4.5 inches wide.\u003c\/li\u003e\n\u003cli\u003eStraight Schrader valves, also known as AV or car-type valves.\u003c\/li\u003e\n\u003cli\u003eA two-tube pack for replacing both tubes or keeping a spare.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eYunSCM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eProduct\u003c\/th\u003e\n\u003ctd\u003eHeavy duty bicycle inner tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003e2 inner tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTyre size\u003c\/th\u003e\n\u003ctd\u003e20 × 4.0–4.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eETRTO size\u003c\/th\u003e\n\u003ctd\u003e102\/114-406\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eValve\u003c\/th\u003e\n\u003ctd\u003eStraight Schrader \/ AV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eValve length\u003c\/th\u003e\n\u003ctd\u003e32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eButyl and EPDM rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eColour\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eWill these inner tubes fit my fat bike?\u003c\/h3\u003e\n\u003cp\u003eMatch the size printed on your tyre sidewall and existing tube, including the ETRTO rim diameter. This size range includes 20 × 4.0, 20 × 4.25 and 20 × 4.5 tyres with the matching 406mm rim diameter. Check that your rim accepts a Schrader valve and that a 32mm valve is long enough for the rim depth and pump connection.\u003c\/p\u003e\n\n\u003cp\u003eCompatibility depends on the tyre size, rim and valve fit, rather than the bike brand alone. If you are unsure, \u003ca href=\"\/pages\/contact-us\"\u003econtact us\u003c\/a\u003e with a photo of the tyre markings and valve.\u003c\/p\u003e\n\n\u003ch3\u003eFitting guidance\u003c\/h3\u003e\n\u003cp\u003eInspect the tyre, rim and rim tape for damage or sharp objects before fitting. Add just enough air to give the tube shape, fit the valve straight, and take care not to trap the tube beneath the tyre bead. Inflate gradually within the limits stated for your tyre and rim.\u003c\/p\u003e\n\u003cp\u003eHeavy duty tubes can still puncture. Check tyre pressure regularly and replace any damaged tube or valve.\u003c\/p\u003e\n\n\u003cp\u003eBrowse our \u003ca href=\"\/collections\/tyres-inner-tubes\"\u003etyres and inner tubes\u003c\/a\u003e for other sizes.\u003c\/p\u003e\n\u003cp style=\"margin:16px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-inner-tubes-description-01.jpg?v=1790445283\" alt=\"YunSCM heavy duty bicycle inner tube brand banner\" width=\"600\" height=\"180\" loading=\"lazy\" style=\"display:block;width:100%;max-width:600px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:16px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-inner-tubes-description-02.jpg?v=1790445294\" alt=\"YunSCM 20 × 4.0–4.5 inner tubes, two pack with 32 mm Schrader valves\" width=\"970\" height=\"600\" loading=\"lazy\" style=\"display:block;width:100%;max-width:970px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:16px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-inner-tubes-description-03.jpg?v=1790445303\" alt=\"YunSCM heavy duty inner tube range shown in different cycling settings\" width=\"970\" height=\"600\" loading=\"lazy\" style=\"display:block;width:100%;max-width:970px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:16px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-inner-tubes-description-04.jpg?v=1790445315\" alt=\"YunSCM 20 × 4.0–4.5 inner tube construction, size marking and Schrader valve details\" width=\"970\" height=\"600\" loading=\"lazy\" style=\"display:block;width:100%;max-width:970px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:16px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-inner-tubes-description-05.jpg?v=1790445325\" alt=\"Pack of two YunSCM heavy duty inner tubes with product packaging\" width=\"970\" height=\"600\" loading=\"lazy\" style=\"display:block;width:100%;max-width:970px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:16px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-inner-tubes-description-06.jpg?v=1790445336\" alt=\"YunSCM illustrated guide to fitting a bicycle inner tube\" width=\"970\" height=\"600\" loading=\"lazy\" style=\"display:block;width:100%;max-width:970px;height:auto;margin:0 auto;\"\u003e\u003c\/p\u003e","brand":"YunSCM","offers":[{"title":"Default Title","offer_id":56474181796219,"sku":"ESL-YUN-56474181796219","price":23.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0044\/9377\/0822\/files\/yunscm-20x4-heavy-duty-inner-tubes-pair.jpg?v=1790441309","url":"https:\/\/www.electricscooterslondon.com\/products\/yunscm-20x4-heavy-duty-inner-tubes-pair","provider":"Electric Scooters London","version":"1.0","type":"link"}