This is a single 20x4” bicycle inner tube with a Schrader valve. Compatible with all Biktrix electric bikes equipped with 20x4” fat eBike tires. Have a spare handy and ready to replace your existing inner tube as it wears or fails.
|Juggernaut Hub Duo Small|
|Kutty X / Kutty X 2|
|Challenger 1 / 2|
|Kutty (some versions)|
|Other Biktrix eBikes with 20x4 tires|