{"product_id":"sunlite-inner-tube-20-1-3-8-451-32-32-mm-presta-valve","title":"Sunlite Inner Tube – 20 × 1-3\/8 (451 × 32) | 32 mm Presta Valve","description":"\u003cp data-start=\"104\" data-end=\"281\"\u003eThis Sunlite inner tube is designed for 20-inch wheels using the 451 BSD standard and a Presta valve, providing a correct replacement for performance-oriented small-wheel bikes.\u003c\/p\u003e\n\u003cp data-start=\"283\" data-end=\"554\"\u003eBuilt to fit ISO 451 rims, this tube is commonly used on folding bikes, recumbents, and select performance BMX or road-style small-wheel applications where accurate sizing is critical. The threaded Presta valve allows secure pump attachment and precise inflation control.\u003c\/p\u003e\n\u003cp data-start=\"556\" data-end=\"863\"\u003eKey Features\u003cbr data-start=\"568\" data-end=\"571\"\u003e• Designed specifically for ISO 451 (20 × 1-3\/8) wheels\u003cbr data-start=\"626\" data-end=\"629\"\u003e• Presta valve for performance and high-pressure applications\u003cbr data-start=\"690\" data-end=\"693\"\u003e• Threaded valve stem for secure pump engagement\u003cbr data-start=\"741\" data-end=\"744\"\u003e• Removable valve core for service or replacement\u003cbr data-start=\"793\" data-end=\"796\"\u003e• Suitable for everyday riding and performance small-wheel setups\u003c\/p\u003e\n\u003cp data-start=\"865\" data-end=\"1156\"\u003eTechnical Details\u003cbr data-start=\"882\" data-end=\"885\"\u003e• Wheel Size: 20 inch\u003cbr data-start=\"906\" data-end=\"909\"\u003e• Tire Compatibility: 20 × 1-3\/8 (451 × 32)\u003cbr data-start=\"952\" data-end=\"955\"\u003e• ISO (BSD): 451\u003cbr data-start=\"971\" data-end=\"974\"\u003e• Valve Type: Presta\u003cbr data-start=\"994\" data-end=\"997\"\u003e• Valve Length: 32 mm\u003cbr data-start=\"1018\" data-end=\"1021\"\u003e• Valve Angle: 0° (straight)\u003cbr data-start=\"1049\" data-end=\"1052\"\u003e• Valve Stem: Threaded\u003cbr data-start=\"1074\" data-end=\"1077\"\u003e• Valve Core: Removable\u003cbr data-start=\"1100\" data-end=\"1103\"\u003e• Wall Thickness: 0.9 mm\u003cbr data-start=\"1127\" data-end=\"1130\"\u003e• Flat Fold Width: 33 mm\u003c\/p\u003e\n\u003cp data-start=\"1158\" data-end=\"1373\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eCompatibility Note\u003cbr data-start=\"1176\" data-end=\"1179\"\u003eThis tube fits ISO 451 wheels only and is not interchangeable with ISO 406 (standard 20\") wheels. Always confirm the ISO number printed on the tire sidewall before purchase to ensure proper fit.\u003c\/p\u003e","brand":"Sunlite","offers":[{"title":"Default Title","offer_id":52636591620410,"sku":null,"price":8.19,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5735\/8394\/files\/63230.jpg?v=1768410730","url":"https:\/\/gograva.com\/products\/sunlite-inner-tube-20-1-3-8-451-32-32-mm-presta-valve","provider":"Grava Adventure Corporation","version":"1.0","type":"link"}