185/55R15 tire size
A 185/55R15 tire stands 23.0 inches tall and 7.3 inches wide, with a 4.0-inch sidewall on a 15-inch rim.
- Overall height
- 23.0 in585 mm
- Section width
- 7.3 in185 mm
- Sidewall height
- 4.0 in102 mm
- Rim diameter
- 15 in381 mm
- Circumference
- 72.3 in1836 mm
- Revolutions per mile
- 876545 per km
- Inch size
- 23.0x7.3R15
Compare it with any other size in the tire size calculator.
Sizes you can swap to
These 15-inch sizes are within two width steps and 3% of a 185/55R15's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 205/50R15, 0.3% taller (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 13-inch or 14-inch or 16-inch or 17-inch rims, these are the closest matches to a 185/55R15.
Other 15-inch sizes near 185/55R15
185 mm wide, other sidewalls
55 series, other widths
See the other sizes for this rim on 15-inch tire sizes.
Shop 185/55R15 tires
These open each store's own list of 185/55R15 tires, where you can filter by type, load and speed rating.
185/55R15 questions
How tall is a 185/55R15 tire?
About 23.0 inches (585 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 185/55R15 mean?
185 is the section width in millimetres (7.3 in). 55 means the sidewall is 55% of that width: 102 mm, or 4.0 in. R means radial construction, and 15 is the rim diameter in inches.
Can I use 205/50R15 instead of 185/55R15?
205/50R15 is 0.3% taller (0.06 in) and 20 mm wider, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.2 mph. Make sure the extra width clears the suspension and fender liner at full lock.
What is 185/55R15 in inches?
In inch terms it is 23.0x7.3R15: 23.0 inches tall, 7.3 inches wide, for a 15-inch rim.
How many revolutions per mile does a 185/55R15 make?
About 876 turns per mile, worked out from its unloaded circumference of 72.3 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.