245/70R17 Tire Size Specifications
This tire size 245/70R17 fits 2 vehicles in our database.
Everything to know about the 245/70R17 tire size
Size geometry
A 245/70R17 tire has a 245mm section width and a 70% aspect ratio, mounted on a 17-inch rim. Sidewall height works out to 171.5mm (6.75") and overall outside diameter is 774.8mm (30.50"). At highway speed the tire completes about 411 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 245/70R17 is unavailable, the closest same-diameter substitutes on the same rim are 235/73R17 and 255/67R17. Both keep your speedometer reading within 1% â safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.
Plus / minus sizing options
For a 245/70R17 you can upsize to 255/62R18 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 235/78R16 (minus-one) for a softer ride or winter setup. Both stay inside the Âą3% diameter tolerance that ABS and TPMS systems expect.
Vehicle compatibility
2 vehicles in our database run the 245/70R17 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance â match these specs to your wheel before purchasing tires.