285/70R18 tire size
A 285/70R18 tire stands 33.7 inches tall and 11.2 inches wide, with a 7.9-inch sidewall on an 18-inch rim.
- Overall height
- 33.7 in856 mm
- Section width
- 11.2 in285 mm
- Sidewall height
- 7.9 in200 mm
- Rim diameter
- 18 in457 mm
- Circumference
- 105.9 in2690 mm
- Revolutions per mile
- 598372 per km
- Inch size
- 33.7x11.2R18
Compare it with any other size in the tire size calculator.
Sizes you can swap to
These 18-inch sizes are within two width steps and 3% of a 285/70R18's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 265/75R18, 0.2% shorter (0.06 in). Wider sizes also need room in the wheel well and a rim width that suits them.
Plus and minus sizes
Changing rim size means changing the sidewall to keep the same overall height. On 16-inch or 17-inch or 19-inch or 20-inch rims, these are the closest matches to a 285/70R18.
285/70R18 compared
LT285/70R18
LT285/70R18 is the light-truck version of this size, with the same nominal height and width: 33.7 by 11.2 inches. LT tires have stiffer construction for heavier loads and towing, run at higher pressures and carry a load range (C, D, E or F) instead of a passenger load rating. Fit LT tires where the door placard calls for them or the truck works hard; on a light-duty vehicle they ride firmer than the P-metric size.
Other 18-inch sizes near 285/70R18
285 mm wide, other sidewalls
70 series, other widths
See the other sizes for this rim on 18-inch tire sizes.
Shop 285/70R18 tires
These open each store's own list of 285/70R18 tires, where you can filter by type, load and speed rating.
285/70R18 questions
How tall is a 285/70R18 tire?
About 33.7 inches (856 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 285/70R18 mean?
285 is the section width in millimetres (11.2 in). 70 means the sidewall is 70% of that width: 200 mm, or 7.9 in. R means radial construction, and 18 is the rim diameter in inches.
Is LT285/70R18 the same size as 285/70R18?
Yes, they share the same nominal size: 33.7 inches tall and 11.2 inches wide. The difference is construction. LT tires are built for heavier loads at higher pressures and carry a load range letter (C, D, E or F); they ride firmer than passenger tires.
Can I use 265/75R18 instead of 285/70R18?
265/75R18 is 0.2% shorter (0.06 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 59.9 mph.
What is 285/70R18 in inches?
In inch terms it is 33.7x11.2R18: 33.7 inches tall, 11.2 inches wide, for an 18-inch rim.
How many revolutions per mile does a 285/70R18 make?
About 598 turns per mile, worked out from its unloaded circumference of 105.9 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.