Product Description The T8Convertible-Air (T8C-Air) is the next generation of the TRIKKETM T8. The T8C-Air is a TRIKKE but it is NOT the v.1 or v.2 like you see on TV and others selling for $129 or less. The T8v.1 or v.2 will NOT mount the rubber air tires. The T8Convertible is the first hybrid Trikke product to enable the mounting of both polyurethane and rubber air tires on the same frame. The frame has been re-designed to make-go easier and is faster. The T8C-Air offers much more in versatility of the surfaces you can ride on verses the polyurethane. It is the ultimate adult ride for all around utility. It's more portable than the T12 Roadster, but equipped with the much sought-after air-filled tires for better hill climbing and smooth travel over varied terrain. The T8C-Air allows the same traction-filled ride as the T12 so that you can throw all of your energy into your turns, but at 20 pounds can easily be tossed into your trunk or carried up stairs, onto the subway or through a café. The T8C-Air is the best iteration yet of the Ultimate Fun-Fitness Machine.