255/40R19 tire size
A 255/40R19 tire is 255 mm wide with a 102.0 mm sidewall, 40% of the width, on a 19-inch rim, which puts the whole tire at 686.6 mm, or about 27.0 inches, tall. No model in our data leaves the factory on it, but it can replace the original size on 13 models within 3% of the height.
Overall height
686.6 mm
27.0 in
Sidewall
102.0 mm
40%
Circumference
2,157 mm
Revs per km
464
Actual dimensions of 255/40R19
| Section width | 255 mm (10.0 in) |
| Sidewall height | 102.0 mm (4.02 in) |
| Rim diameter | 19 in (482.6 mm) |
| Overall diameter | 686.6 mm (27.0 in) |
| Circumference | 2,157 mm |
| Revolutions per km | 464 |
| Inch notation (height x width) | 27.0x10.0R19 |
Worked out: sidewall 255 x 0.4 = 102 mm, rim 19 x 25.4 = 482.6 mm, overall 482.6 + (102 x 2) = 686.6 mm, circumference 3.1416 x 686.6 = 2,157 mm. One turn of the tire moves the car about 2.16 m, which is 464 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 255/40R19 from the factory
No model sold in Thailand in our data leaves the factory on 255/40R19.
Cars that can switch to 255/40R19
These cars leave the factory on another size within 3% of the height of 255/40R19. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| BYD Seal2023–present | 235/45R19 | −1.08% | Same wheel |
| Tesla Model 32024–present | 235/40R19 | +2.39% | Same wheel |
| Toyota C-HR2018–2023 | 225/50R18 | +0.64% | Needs 19-inch wheels |
| Toyota Corolla Cross2020–present | 225/50R18 | +0.64% | Needs 19-inch wheels |
| Toyota Innova Zenix HEV2023–present | 225/50R18 | +0.64% | Needs 19-inch wheels |
| Honda e:N12024–present | 225/50R18 | +0.64% | Needs 19-inch wheels |
| Honda HR-V e:HEV2022–present | 225/50R18 | +0.64% | Needs 19-inch wheels |
| Mitsubishi Xforce HEVCurrent model | 225/50R18 | +0.64% | Needs 19-inch wheels |
| MG HS / HS PHEVCurrent model | 235/50R18 | −0.81% | Needs 19-inch wheels |
| BYD ATTO 32022–present | 235/50R18 | −0.81% | Needs 19-inch wheels |
| Toyota Camry HEV2024–present | 235/45R18 | +2.68% | Needs 19-inch wheels |
| Honda Accord e:HEV2024–present | 235/45R18 | +2.68% | Needs 19-inch wheels |
Showing the 12 closest of 13 models.
Sizes that can replace 255/40R19
Sizes within ±3% of the overall height of 255/40R19. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 255/35R20 | 686.5 mm | −0.1 mm (−0.01%) | 100.0 km/h | 89.3 mm | Very close | Compare |
| 255/45R18 | 686.7 mm | +0.1 mm (+0.01%) | 100.0 km/h | 114.8 mm | Very close | Compare |
| 225/45R19 | 685.1 mm | −1.5 mm (−0.22%) | 99.8 km/h | 101.3 mm | Very close | Compare |
| 225/50R18 | 682.2 mm | −4.4 mm (−0.64%) | 99.4 km/h | 112.5 mm | Close | Compare |
| 235/50R18 | 692.2 mm | +5.6 mm (+0.82%) | 100.8 km/h | 117.5 mm | Close | Compare |
| 245/35R20 | 679.5 mm | −7.1 mm (−1.03%) | 99.0 km/h | 85.8 mm | Close | Compare |
| 235/45R19 | 694.1 mm | +7.5 mm (+1.09%) | 101.1 km/h | 105.8 mm | Close | Compare |
| 245/40R19 | 678.6 mm | −8.0 mm (−1.17%) | 98.8 km/h | 98.0 mm | Close | Compare |
- Keeping your wheels, the closest is 225/45R19 at 685.1 mm, −1.5 mm (−0.22%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 99.8 km/h. Ground clearance drops by about 0.8 mm.
- Moving up to 20-inch wheels, the closest height match is 255/35R20 (−0.01%), with the sidewall dropping from 102.0 mm to 89.3 mm.
- Going down to 18-inch wheels, 255/45R18 (+0.01%) is the closest match and raises the sidewall to 114.8 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 255/40R19 tires
Low-profile sizes are mostly performance tires and price rises with W or Y speed ratings; comfort-focused models exist in the same size if you do not drive hard.
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 255/40R19
The code after the size on the sidewall, as in 255/40R19 96V, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 96 | 710 kg | 2,840 kg |
| Extra load (XL) | 100 | 800 kg | 3,200 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
V
240 km/h
W
270 km/h
Y
300 km/h
255/40R19 questions
How tall is a 255/40R19 tire?
About 27.0 inches, or 686.6 mm, from top to bottom before it carries weight. Each sidewall is 102.0 mm tall and the tire is 255 mm (10.0 in) wide.
Which cars use 255/40R19 tires?
No car in our data is fitted with 255/40R19 from the factory, but its height is close to the original size on BYD Seal, Tesla Model 3, Toyota C-HR, Toyota Corolla Cross and Toyota Innova Zenix HEV, so it works as a replacement size.
Can I fit 225/45R19 instead of 255/40R19?
Size-wise, yes: the height differs by −0.22% (−1.5 mm), so an indicated 100 km/h is really about 99.8 km/h. The tread is 30 mm narrower. Check rim width and load index first.
How much weight can a 255/40R19 tire carry?
Most standard-load versions carry load index 96: 710 kg per tire, 2,840 kg across four. XL versions are rated 100, or 800 kg per tire. Look for the number after the size on the sidewall, as in 255/40R19 96V.
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.