255/70R16
255/70R16 ships as an OEM size on the Ford Ranger, Nissan Frontier. At 30.06″ diameter with a 7.03″ sidewall (70% of section width), this size turns 671 revolutions per mile.
About 255/70R16
Factory fitments for 255/70R16 include the Ford Ranger, Nissan Frontier — meaning replacement tires in this size see steady demand and broad brand availability. At 30.06″ overall diameter, 255/70R16 turns 671 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 70% aspect ratio gives it a tall, compliant sidewall that absorbs bumps well and protects rims off-road. 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. Going one step shorter to 265/65R16 drops diameter by 1.64%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 275/65R16 adds 0.07% 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 30.06″ 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 aliases255/70R16
- Diameter
- 30.06″ / 763.4mm
- Section Width
- 10.04″
- Sidewall
- 7.03″ / 178.5mm
- Circumference
- 94.42″
- Revs/Mile
- 671
235/70R16
- Diameter
- 28.95″ / 735.4mm
- Section Width
- 9.25″
- Sidewall
- 6.48″ / 164.5mm
- Circumference
- 90.96″
- Revs/Mile
- 697
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 57.8 mph (93.02 km/h). Your speedometer reads 3.67% high versus actual speed.