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Continue to ChatInner Tube - 12.5x2.5/2.75, Straight Valve Stem - 40P2050 - PBC3398F1 - https://www.electricbikeusa.net/parts-catalog/tires-rims-tubes/inner-tube-12-5x2-5-2-75-pbc3016yt
Inner Tube - 12.5x2.5/2.75, Straight Valve Stem - 40P2050 - PBC3398F1 - https://www.electricbikeusa.net/parts-catalog/tires-rims-tubes/inner-tube-12-5x2-5-2-75-pbc3016yt