- 20x4 Heavy-Duty Fat Tire Tube - Military-Grade Butyl Rubber, Schrader Valve...

Ride harder and ride longer. ’s military-grade butyl rubber fat tire bike tubes with variable thicknesses keep weight down and give your tires strength where you need it. Upgrade your fat tire electric bike tubes or traditional fat tire bike tubes to avoid punctures with these ultra-grade, heavy duty fat tire bike tubes.

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