275/65R18 tire size
A 275/65R18 tire stands 32.1 inches tall and 10.8 inches wide, with a 7.0-inch sidewall on an 18-inch rim.
- Overall height
- 32.1 in815 mm
- Section width
- 10.8 in275 mm
- Sidewall height
- 7.0 in179 mm
- Rim diameter
- 18 in457 mm
- Circumference
- 100.8 in2559 mm
- Revolutions per mile
- 629391 per km
- Inch size
- 32.1x10.8R18
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 275/65R18's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 255/70R18, 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 275/65R18.
275/65R18 compared
LT275/65R18
LT275/65R18 is the light-truck version of this size, with the same nominal height and width: 32.1 by 10.8 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 275/65R18
275 mm wide, other sidewalls
65 series, other widths
See the other sizes for this rim on 18-inch tire sizes.
Shop 275/65R18 tires
These open each store's own list of 275/65R18 tires, where you can filter by type, load and speed rating.
275/65R18 questions
How tall is a 275/65R18 tire?
About 32.1 inches (815 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 275/65R18 mean?
275 is the section width in millimetres (10.8 in). 65 means the sidewall is 65% of that width: 179 mm, or 7.0 in. R means radial construction, and 18 is the rim diameter in inches.
Is LT275/65R18 the same size as 275/65R18?
Yes, they share the same nominal size: 32.1 inches tall and 10.8 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 255/70R18 instead of 275/65R18?
255/70R18 is 0.1% shorter (0.02 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.0 mph.
What is 275/65R18 in inches?
In inch terms it is 32.1x10.8R18: 32.1 inches tall, 10.8 inches wide, for an 18-inch rim.
How many revolutions per mile does a 275/65R18 make?
About 629 turns per mile, worked out from its unloaded circumference of 100.8 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.