Universal Parts 10mm Valve Stem for Electric Scooters $2.49 Quantity discounts available QuantityPrice SKU: 183-50 This item is IN STOCKCurrent Stock: 212 Quantity -+ Add to Cart Details Universal Parts 10mm valve stem for electric scooters with tubeless tires.If you've found standard valve stems to be to large for your electric stand ... Specs Outer Diameter (where stem mounts): 10.5mm Supported Models Universal Fit DetailsSpecsSupported Models Back Universal Parts 10mm valve stem for electric scooters with tubeless tires.If you've found standard valve stems to be to large for your electric stand up scooter, this is most likely the size you need. Back Outer Diameter (where stem mounts): 10.5mm Back Universal Fit