Kenda 20×3.5–4.0 Fat E-Bike Tube – Heavy-Duty Butyl Inner Tube, Schrader Valve

The Kenda 20×3.5–4.0 Fat E-Bike Tube is built for compact fat-tire electric bikes that demand durability, reliability, and consistent air retention. Designed to support wide 20″ tires commonly found on folding e-bikes, cargo bikes, and utility e-bikes, this tube delivers dependable performance under higher loads and torque.

Manufactured by Kenda, this tube uses premium butyl rubber to resist air loss and reduce the chance of pinch flats—making it a shop-grade replacement rather than a disposable tube.

Why This Tube Is Better

• Wide Tire Compatibility: Fits 20″ tires from 3.5″ to 4.0″ wide

• Heavy-Duty Butyl Rubber: Excellent air retention and durability

• Schrader Valve (AV): Easy inflation with standard bike pumps or air compressors

• E-Bike Ready: Designed to handle added weight and motor torque

• Trusted Brand: Kenda tubes are widely used by OEMs and professional shops

Perfect For

• Folding fat-tire e-bikes

• Cargo and utility e-bikes

• Compact cruisers and mini fat bikes

• Daily commuters and rental fleets

Specifications

• Wheel Size: 20 inch

• Tire Width Range: 3.5″ – 4.0″

• Tube Material: Butyl rubber

• Valve Type: Schrader (AV)

• Color: Black

Installation Notes

• Verify rim is drilled for a Schrader valve

• Inspect rim tape and tire casing before installation

• Inflate gradually to manufacturer-recommended pressure