https://www.techtronic.site/tinkel-8-5-inch-thickened-inner-tubes-for-xiaomi-m365-gotrax-electric-scooter-inflated-spare-tire-replace-tires-2-pack/
Tinkel 8.5-Inch Thickened Inner Tubes for Xiaomi M365 / Gotrax Electric Scooter Inflated Spare Tire Replace Tires 2 Pack