Universal Parts 20x4 Heavy Duty Inner Tube $12.99 Quantity discounts available QuantityPrice SKU: 136-133 This item is IN STOCKCurrent Stock: 2 Quantity -+ Add to Cart Details Universal Parts 20x4 heavy duty inner tube for fat tire bikes and E-bikes. Popular models that use this tube include super73, Lectric, RadPower and ma... Specs Schrader ValveHeavy Duty Supported Models Universal Fit DetailsSpecsSupported Models Back Universal Parts 20x4 heavy duty inner tube for fat tire bikes and E-bikes. Popular models that use this tube include super73, Lectric, RadPower and many more. Also compatible with 90/100-16 and 3.50/4.00-16 size tire/tube. Back Schrader ValveHeavy Duty Back Universal Fit