285/75R18 tire size
A 285/75R18 tire stands 34.8 inches tall and 11.2 inches wide, with a 8.4-inch sidewall on an 18-inch rim.
- Overall height
- 34.8 in885 mm
- Section width
- 11.2 in285 mm
- Sidewall height
- 8.4 in214 mm
- Rim diameter
- 18 in457 mm
- Circumference
- 109.4 in2779 mm
- Revolutions per mile
- 579360 per km
- Inch size
- 34.8x11.2R18
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 285/75R18's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 305/70R18, 0.1% shorter (0.02 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 285/75R18.
LT285/75R18
LT285/75R18 is the light-truck version of this size, with the same nominal height and width: 34.8 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 285/75R18
285 mm wide, other sidewalls
75 series, other widths
See the other sizes for this rim on 18-inch tire sizes, or other tires about this tall on 35-inch tires.
Shop 285/75R18 tires
These open each store's own list of 285/75R18 tires, where you can filter by type, load and speed rating.
285/75R18 questions
How tall is a 285/75R18 tire?
About 34.8 inches (885 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 285/75R18 mean?
285 is the section width in millimetres (11.2 in). 75 means the sidewall is 75% of that width: 214 mm, or 8.4 in. R means radial construction, and 18 is the rim diameter in inches.
Is LT285/75R18 the same size as 285/75R18?
Yes, they share the same nominal size: 34.8 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 305/70R18 instead of 285/75R18?
305/70R18 is 0.1% shorter (0.02 in) and 20 mm wider, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.0 mph. Make sure the extra width clears the suspension and fender liner at full lock.
What is 285/75R18 in inches?
In inch terms it is 34.8x11.2R18: 34.8 inches tall, 11.2 inches wide, for an 18-inch rim.
How many revolutions per mile does a 285/75R18 make?
About 579 turns per mile, worked out from its unloaded circumference of 109.4 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.