245/50R18 tire size
A 245/50R18 tire stands 27.6 inches tall and 9.6 inches wide, with a 4.8-inch sidewall on an 18-inch rim.
- Overall height
- 27.6 in702 mm
- Section width
- 9.6 in245 mm
- Sidewall height
- 4.8 in123 mm
- Rim diameter
- 18 in457 mm
- Circumference
- 86.9 in2206 mm
- Revolutions per mile
- 730453 per km
- Inch size
- 27.6x9.6R18
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 245/50R18's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 225/55R18, 0.4% taller (0.10 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 245/50R18.
Other 18-inch sizes near 245/50R18
245 mm wide, other sidewalls
50 series, other widths
See the other sizes for this rim on 18-inch tire sizes.
Shop 245/50R18 tires
These open each store's own list of 245/50R18 tires, where you can filter by type, load and speed rating.
245/50R18 questions
How tall is a 245/50R18 tire?
About 27.6 inches (702 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 245/50R18 mean?
245 is the section width in millimetres (9.6 in). 50 means the sidewall is 50% of that width: 123 mm, or 4.8 in. R means radial construction, and 18 is the rim diameter in inches.
Can I use 225/55R18 instead of 245/50R18?
225/55R18 is 0.4% taller (0.10 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.2 mph.
What is 245/50R18 in inches?
In inch terms it is 27.6x9.6R18: 27.6 inches tall, 9.6 inches wide, for an 18-inch rim.
How many revolutions per mile does a 245/50R18 make?
About 730 turns per mile, worked out from its unloaded circumference of 86.9 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.