275/70R17
275/70R17 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 32.16″ diameter with a 7.58″ sidewall (70% of section width), this size turns 627 revolutions per mile.
About 275/70R17
275/70R17 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 32.16″ overall diameter, 275/70R17 turns 627 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 17″ 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 255/75R17 drops diameter by 0.31%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 285/70R17 adds 1.71% 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 32.16″ 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 aliases275/70R17
- Diameter
- 32.16″ / 816.8mm
- Section Width
- 10.83″
- Sidewall
- 7.58″ / 192.5mm
- Circumference
- 101.03″
- Revs/Mile
- 627
255/70R17
- Diameter
- 31.06″ / 788.8mm
- Section Width
- 10.04″
- Sidewall
- 7.03″ / 178.5mm
- Circumference
- 97.56″
- Revs/Mile
- 649
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 57.94 mph (93.25 km/h). Your speedometer reads 3.43% high versus actual speed.