20" x 4.00-4.25" Tire Tube

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We recommend thorn resistant tubes for most e-bikes. Since they have a thickness of over 4mm in the middle of the tube itself, they offer increased puncture protection, plus increased strength against pinch flats.

From the distributor:

Size: 20x4.00 Valve Type: SV
Valve Length: 32mm Valve Angle: 0d
Valve Stem: Smooth Valve Core: Removable
Flat Fold Width: 92mm Wall Thickness: 0.9mm