The "R" version of the Vespa 50 was the most economical model in the series, distinguished from the others by its 9" wheels and front handlebar cowl matching the body colour. The gearbox was three-speed. This 50 was particularly popular among fourteen-year-olds because it seemed to fully satisfy the widespread desire for freedom, in part thanks to its excellent value for money.
- Engine – single cylinder two-stroke;
- Bore – 38,4 mm;
- Stroke – 43 mm;
- Displacement – 49,8 cc;
- Max speed – 40 Km/h;
- Suspensions – trailing arm with coil spring and damper in front; rear suspension with coil spring and damper;
- Breaks – drums.
- 1969 VIN chassis numbers: 700001-702503 (2502 units produced);
- 1970 VIN chassis numbers: 702504-735716 (33212 units produced);
- 1971 VIN chassis numbers: 735717-769612 (33895 units produced);
- 1972 VIN chassis numbers: 769613-804164 (34551 units produced);
- 1973 VIN chassis numbers: 804165-831712 (27547 units produced);
- 1974 VIN chassis numbers: 831713-861870 (30157 units produced).