235/70R17
235/70R17 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 29.95″ diameter with a 6.48″ sidewall (70% of section width), this size turns 673 revolutions per mile.
About 235/70R17
235/70R17 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 29.95″ overall diameter, 235/70R17 turns 673 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 245/65R17 drops diameter by 1.38%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 245/70R17 adds 1.84% 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 29.95″ 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 aliases235/70R17
- Diameter
- 29.95″ / 760.8mm
- Section Width
- 9.25″
- Sidewall
- 6.48″ / 164.5mm
- Circumference
- 94.1″
- Revs/Mile
- 673
215/70R17
- Diameter
- 28.85″ / 732.8mm
- Section Width
- 8.46″
- Sidewall
- 5.93″ / 150.5mm
- Circumference
- 90.64″
- Revs/Mile
- 699
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 57.79 mph (93.01 km/h). Your speedometer reads 3.68% high versus actual speed.