195/50R16
195/50R16 ships as an OEM size on the Mazda MX-5 Miata. At 23.68″ diameter with a 3.84″ sidewall (50% of section width), this size turns 852 revolutions per mile.
About 195/50R16
Factory fitments for 195/50R16 include the Mazda MX-5 Miata — meaning replacement tires in this size see steady demand and broad brand availability. At 23.68″ overall diameter, 195/50R16 turns 852 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 50% aspect ratio gives it a moderate sidewall suited to sporty street driving and responsive turn-in. The 16″ rim pairing is typical for light-truck, crossover, and mid-size SUV applications, so compatible wheels are easy to source new or used. Stepping up to 205/50R16 adds 1.66% diameter — also inside the safe window, with marginally taller ride height. If you are shopping for a direct replacement, any tire within roughly ±0.7″ of the 23.68″ stock diameter (about ±2% in percentage terms) will keep ABS, TPMS, and odometer readings inside the vehicle's designed tolerance.
Compare with another size
275/65R18 or "33" for inch aliases195/50R16
- Diameter
- 23.68″ / 601.4mm
- Section Width
- 7.68″
- Sidewall
- 3.84″ / 97.5mm
- Circumference
- 74.38″
- Revs/Mile
- 852
195/55R16
- Diameter
- 24.44″ / 620.9mm
- Section Width
- 7.68″
- Sidewall
- 4.22″ / 107.25mm
- Circumference
- 76.8″
- Revs/Mile
- 825
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.95 mph (99.69 km/h). Your speedometer reads 3.24% low versus actual speed.