10 inch (10") solid tire, 10x2.5, (sometimes casually called 60/70-6.5 because of the associated pneumatic tire code). Solid tires remove the maintenance of keeping tires properly inflated and the worries of getting a flat. Puncture-proof ''flat-free''. Featuring the most popular directional street tread available. Highly durable. Direct replacement for SHOK Scooters Proton kick scooter as well as many other brands and models such as Segway Ninebot Max G30 / G30LP and Xiaomi.