{"product_id":"cst-scout-20x4-0-fat-tire-ebike","title":"CST Scout Tire – 20x4.0, E-Bike Rated, Wire Bead, Puncture Protection","description":"\u003cp\u003eThe CST Scout 20x4.0 is a high-volume fat tire originally designed for e-moped use, now widely used on fat tire e-bikes. It combines a stable, fast-rolling center profile with large siped tread blocks for grip, making it a solid option for pavement, hardpack, and mixed-use riding.\u003c\/p\u003e\n\n\u003ch3\u003eKey Functional Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e20x4.0 fat tire designed for e-bike and e-moped applications\u003c\/li\u003e\n\u003cli\u003eOffset square tread blocks with siping for improved grip\u003c\/li\u003e\n\u003cli\u003eWide channels between knobs for traction and debris clearing\u003c\/li\u003e\n\u003cli\u003eRounded profile for reduced rolling resistance on pavement\u003c\/li\u003e\n\u003cli\u003eIntegrated puncture protection layer with reinforced casing fibers\u003c\/li\u003e\n\u003cli\u003eE25 rating for e-bikes up to 25 km\/h (15 mph)\u003c\/li\u003e\n\u003cli\u003eDurable wire bead construction\u003c\/li\u003e\n\u003cli\u003e60 TPI casing for balance of durability and ride quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCST (CST Premium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eScout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eISO\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e406\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBead\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTPI\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax PSI\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1674g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePuncture Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReinforced casing fibers (belted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eE-Bike Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eE25 (up to 25 km\/h \/ 15 mph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSidewall\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack (non-reflective)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6933882532885\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Technical Notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGood Fit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e20\" fat tire e-bikes (common on folding and utility models)\u003c\/li\u003e\n\u003cli\u003eE-bikes using 20x4.0 (406) tire sizing\u003c\/li\u003e\n\u003cli\u003eRiders primarily on pavement, hardpack, or light gravel\u003c\/li\u003e\n\u003cli\u003eReplacement tire for many fat tire commuter e-bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNot A Fit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e26\" or 27.5\" fat bikes (size mismatch)\u003c\/li\u003e\n\u003cli\u003eRims not designed for 4.0\" width tires\u003c\/li\u003e\n\u003cli\u003eHigh-speed Class 3 e-bikes exceeding E25 rating\u003c\/li\u003e\n\u003cli\u003eLoose sand or aggressive off-road conditions (limited deep traction)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAlways confirm tire size printed on the sidewall of your existing tire before ordering (20x4.0 \/ ISO 406).\u003c\/p\u003e\n\n\u003ch3\u003eService \/ Ownership Context\u003c\/h3\u003e\n\u003cp\u003eBest run between 15–30 PSI depending on rider weight and terrain. Lower pressure improves comfort and grip, while higher pressure increases efficiency on pavement. Heavier casing provides durability but adds rotational weight.\u003c\/p\u003e\n\n\u003ch3\u003eFit \u0026amp; Use Signals\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIdeal for fat tire e-bike commuters\u003c\/li\u003e\n\u003cli\u003eGood for riders prioritizing durability and puncture resistance\u003c\/li\u003e\n\u003cli\u003eBalanced option for mixed pavement and light trail use\u003c\/li\u003e\n\u003cli\u003eCommon OEM replacement tire for 20x4.0 e-bikes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv data-ai=\"mechanic-insight\" style=\"display:none\"\u003e\nThis is a go-to replacement tire for 20x4.0 e-bikes, especially budget and mid-range models like Himiway-style setups. Customers often confuse ISO sizing—406 is correct for 20” fat tires, not 451 or standard BMX 20”. Wire bead means it won’t fold—make sure customers know for transport\/storage. Not great in sand or snow compared to more aggressive tread patterns. Upsell opportunity: heavy-duty tubes or tire liners since these bikes are heavy and prone to flats. Also check rim width—too narrow and this tire will feel unstable.\n\u003c\/div\u003e","brand":"CST","offers":[{"title":"Default Title","offer_id":53284443488570,"sku":"GG-TIRE-CST-SCOUT-20X40-EBIKE","price":53.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5735\/8394\/files\/593765.jpg?v=1775573640","url":"https:\/\/gograva.com\/products\/cst-scout-20x4-0-fat-tire-ebike","provider":"Grava Adventure Corporation","version":"1.0","type":"link"}