The Vespa GT (for Gran Turismo
) 125 (VNL) was produced from 1965 to 1978. Basically a refined Vespa Sprint, many were later re-powered with a 200cc engine. The original Vespa Gran Turismo (VNL) used the 3.50-10 tire.
Vespa later introduced modern versions of the Gran Turismo (GTV, GTS) with the liquid-cooled, 4-stroke engine with automatic transmission, these scooters were also the first Vespas to use a 120/70-12 front and 130/70-12 rear tire. Other than name, these newer GTs have little in common with the VNL model. It is important when ordering to distinguish which GT series (vintage VNL or current GTV/GTS) to which your scooter belongs.