225/55R19 tire size
A 225/55R19 tire is 225 mm wide with a 123.8 mm sidewall, 55% of the width, on a 19-inch rim, which puts the whole tire at 730.1 mm, or about 28.7 inches, tall. Our data lists 1 models fitted with it from the factory, mostly SUVs and crossovers.
Overall height
730.1 mm
28.7 in
Sidewall
123.8 mm
55%
Circumference
2,294 mm
Revs per km
436
Actual dimensions of 225/55R19
| Section width | 225 mm (8.9 in) |
| Sidewall height | 123.8 mm (4.87 in) |
| Rim diameter | 19 in (482.6 mm) |
| Overall diameter | 730.1 mm (28.7 in) |
| Circumference | 2,294 mm |
| Revolutions per km | 436 |
| Inch notation (height x width) | 28.7x8.9R19 |
Worked out: sidewall 225 x 0.55 = 123.75 mm, rim 19 x 25.4 = 482.6 mm, overall 482.6 + (123.75 x 2) = 730.1 mm, circumference 3.1416 x 730.1 = 2,294 mm. One turn of the tire moves the car about 2.29 m, which is 436 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 225/55R19 from the factory
Models whose Thai-market specification lists 225/55R19; the source column links to the spec we checked.
| Model | Years | Grades | Source |
|---|---|---|---|
| Mazda CX-5 | 2017–present | 19-inch wheel grades | mazda.co.th |
Cars that can switch to 225/55R19
These cars leave the factory on another size within 3% of the height of 225/55R19. Whether it fits still depends on rim width and wheel-well clearance.
Sizes that can replace 225/55R19
Sizes within ±3% of the overall height of 225/55R19. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 245/45R20 | 728.5 mm | −1.6 mm (−0.22%) | 99.8 km/h | 110.3 mm | Very close | Compare |
| 225/60R18 | 727.2 mm | −2.9 mm (−0.40%) | 99.6 km/h | 135.0 mm | Very close | Compare |
| 255/45R20 | 737.5 mm | +7.4 mm (+1.01%) | 101.0 km/h | 114.8 mm | Close | Compare |
| 255/50R19 | 737.6 mm | +7.5 mm (+1.03%) | 101.0 km/h | 127.5 mm | Close | Compare |
| 255/55R18 | 737.7 mm | +7.6 mm (+1.04%) | 101.0 km/h | 140.3 mm | Close | Compare |
| 235/60R18 | 739.2 mm | +9.1 mm (+1.25%) | 101.2 km/h | 141.0 mm | Close | Compare |
| 235/55R19 | 741.1 mm | +11.0 mm (+1.51%) | 101.5 km/h | 129.3 mm | Close | Compare |
| 235/50R19 | 717.6 mm | −12.5 mm (−1.71%) | 98.3 km/h | 117.5 mm | Close | Compare |
- Keeping your wheels, the closest is 255/50R19 at 737.6 mm, +7.5 mm (+1.03%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 101.0 km/h. Ground clearance rises by about 3.7 mm.
- Moving up to 20-inch wheels, the closest height match is 245/45R20 (−0.22%), with the sidewall dropping from 123.8 mm to 110.3 mm.
- Going down to 18-inch wheels, 225/60R18 (−0.40%) is the closest match and raises the sidewall to 135.0 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 225/55R19 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 225/55R19
The code after the size on the sidewall, as in 225/55R19 99H, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 99 | 775 kg | 3,100 kg |
| Extra load (XL) | 103 | 875 kg | 3,500 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
225/55R19 questions
How tall is a 225/55R19 tire?
About 28.7 inches, or 730.1 mm, from top to bottom before it carries weight. Each sidewall is 123.8 mm tall and the tire is 225 mm (8.9 in) wide.
Which cars use 225/55R19 tires?
From Thai-market specifications, 225/55R19 comes on Mazda CX-5.
Can I fit 255/50R19 instead of 225/55R19?
Size-wise, yes: the height differs by +1.03% (+7.5 mm), so an indicated 100 km/h is really about 101.0 km/h. The tread is 30 mm wider. Check rim width and load index first.
How much weight can a 225/55R19 tire carry?
Most standard-load versions carry load index 99: 775 kg per tire, 3,100 kg across four. XL versions are rated 103, or 875 kg per tire. Look for the number after the size on the sidewall, as in 225/55R19 99H.
Other 19-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.