285/70R17
285/70R17 ships as an OEM size on the Ford Bronco, Jeep Gladiator. At 32.71″ diameter with a 7.85″ sidewall (70% of section width), this size turns 617 revolutions per mile.
About 285/70R17
Factory fitments for 285/70R17 include the Ford Bronco, Jeep Gladiator — meaning replacement tires in this size see steady demand and broad brand availability. At 32.71″ overall diameter, 285/70R17 turns 617 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 275/70R17 drops diameter by 1.69%, which stays within the ±3% fitment safe zone for most vehicles. If you are shopping for a direct replacement, any tire within roughly ±0.7″ of the 32.71″ 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 aliases285/70R17
- Diameter
- 32.71″ / 830.8mm
- Section Width
- 11.22″
- Sidewall
- 7.85″ / 199.5mm
- Circumference
- 102.76″
- Revs/Mile
- 617
265/70R17
- Diameter
- 31.61″ / 802.8mm
- Section Width
- 10.43″
- Sidewall
- 7.3″ / 185.5mm
- Circumference
- 99.29″
- Revs/Mile
- 638
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 57.98 mph (93.31 km/h). Your speedometer reads 3.37% high versus actual speed.
Vehicles that fit 285/70R17
- 2024 Ford BroncoBadlands
- 2023 Ford BroncoBadlands
- 2022 Ford BroncoBadlands
- 2021 Ford BroncoBadlands
- 2024 Jeep GladiatorMojave
- 2024 Jeep GladiatorRubicon
- 2023 Jeep GladiatorMojave
- 2023 Jeep GladiatorRubicon
- 2022 Jeep GladiatorMojave
- 2022 Jeep GladiatorRubicon
- 2021 Jeep GladiatorMojave
- 2021 Jeep GladiatorRubicon