185/55R15 tire size
A 185/55R15 tire is 185 mm wide with a 101.8 mm sidewall, 55% of the width, on a 15-inch rim, which puts the whole tire at 584.5 mm, or about 23.0 inches, tall. Our data lists 1 models fitted with it from the factory, mostly sedans.
Overall height
584.5 mm
23.0 in
Sidewall
101.8 mm
55%
Circumference
1,836 mm
Revs per km
545
Actual dimensions of 185/55R15
| Section width | 185 mm (7.3 in) |
| Sidewall height | 101.8 mm (4.01 in) |
| Rim diameter | 15 in (381.0 mm) |
| Overall diameter | 584.5 mm (23.0 in) |
| Circumference | 1,836 mm |
| Revolutions per km | 545 |
| Inch notation (height x width) | 23.0x7.3R15 |
Worked out: sidewall 185 x 0.55 = 101.75 mm, rim 15 x 25.4 = 381 mm, overall 381 + (101.75 x 2) = 584.5 mm, circumference 3.1416 x 584.5 = 1,836 mm. One turn of the tire moves the car about 1.84 m, which is 545 turns per kilometer. New to sidewall codes? See how to read a tire size.
These are nominal figures from the standard formula. Real tires vary slightly by brand and squat a little under the weight of the car.
Cars fitted with 185/55R15 from the factory
Models whose Thai-market specification lists 185/55R15; the source column links to the spec we checked.
| Model | Years | Grades | Source |
|---|---|---|---|
| Mitsubishi Attrage | 2013–present | GLS-Ltd | community.headlightmag.com |
Cars that can switch to 185/55R15
These cars leave the factory on another size within 3% of the height of 185/55R15. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| Nissan March2010–2022 | 175/60R15 | −1.10% | Same wheel |
| Mitsubishi Mirage2012–present | 175/55R15 | +1.92% | Same wheel |
| Toyota Yaris (Hatchback)2017–present | 175/65R14 | +0.24% | Needs 15-inch wheels |
| Honda Brio / Brio Amaze2011–2019 | 175/65R14 | +0.24% | Needs 15-inch wheels |
| Suzuki Celerio2014–2023 | 165/65R14 | +2.53% | Needs 15-inch wheels |
Sizes that can replace 185/55R15
Sizes within ±3% of the overall height of 185/55R15. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 175/65R14 | 583.1 mm | −1.4 mm (−0.24%) | 99.8 km/h | 113.8 mm | Very close | Compare |
| 165/70R14 | 586.6 mm | +2.1 mm (+0.36%) | 100.4 km/h | 115.5 mm | Very close | Compare |
| 195/45R16 | 581.9 mm | −2.6 mm (−0.44%) | 99.6 km/h | 87.8 mm | Very close | Compare |
| 205/45R16 | 590.9 mm | +6.4 mm (+1.09%) | 101.1 km/h | 92.3 mm | Close | Compare |
| 175/60R15 | 591.0 mm | +6.5 mm (+1.11%) | 101.1 km/h | 105.0 mm | Close | Compare |
| 185/50R16 | 591.4 mm | +6.9 mm (+1.18%) | 101.2 km/h | 92.5 mm | Close | Compare |
| 185/60R14 | 577.6 mm | −6.9 mm (−1.18%) | 98.8 km/h | 111.0 mm | Close | Compare |
| 195/50R15 | 576.0 mm | −8.5 mm (−1.45%) | 98.5 km/h | 97.5 mm | Close | Compare |
- Keeping your wheels, the closest is 175/60R15 at 591.0 mm, +6.5 mm (+1.11%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 101.1 km/h. Ground clearance rises by about 3.3 mm.
- Moving up to 16-inch wheels, the closest height match is 195/45R16 (−0.44%), with the sidewall dropping from 101.8 mm to 87.8 mm.
- Going down to 14-inch wheels, 175/65R14 (−0.24%) is the closest match and raises the sidewall to 113.8 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 185/55R15 tires
Passenger tires in this size come in eco, comfort and sport lines. Japanese and European brands usually cost more than Asian ones, and the difference shows in noise, wet braking and tread life.
Check the production date in the DOT code before paying.
Check current prices
Search by brand
Links open marketplace search results; prices change constantly and not every brand makes this size.
Load index and speed rating for 185/55R15
The code after the size on the sidewall, as in 185/55R15 82H, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 82 | 475 kg | 1,900 kg |
| Extra load (XL) | 86 | 530 kg | 2,120 kg |
The new tire's load index and speed symbol must be no lower than the door placard, and it only carries its rated load at the correct pressure.
Common speed symbols in this size
H
210 km/h
V
240 km/h
185/55R15 questions
How tall is a 185/55R15 tire?
About 23.0 inches, or 584.5 mm, from top to bottom before it carries weight. Each sidewall is 101.8 mm tall and the tire is 185 mm (7.3 in) wide.
Which cars use 185/55R15 tires?
From Thai-market specifications, 185/55R15 comes on Mitsubishi Attrage.
Can I fit 175/60R15 instead of 185/55R15?
Size-wise, yes: the height differs by +1.11% (+6.5 mm), so an indicated 100 km/h is really about 101.1 km/h. The tread is 10 mm narrower. Check rim width and load index first.
How much weight can a 185/55R15 tire carry?
Most standard-load versions carry load index 82: 475 kg per tire, 1,900 kg across four. XL versions are rated 86, or 530 kg per tire. Look for the number after the size on the sidewall, as in 185/55R15 82H.
Other 15-inch sizes
To compare other sizes yourself, use the tire size calculator; changing rim size, try plus/minus sizing; and see speedometer error by speed.