245/40R17 tire size
A 245/40R17 tire is 245 mm wide with a 98.0 mm sidewall, 40% of the width, on a 17-inch rim, which puts the whole tire at 627.8 mm, or about 24.7 inches, tall. No model in our data leaves the factory on it, but it can replace the original size on 6 models within 3% of the height.
Overall height
627.8 mm
24.7 in
Sidewall
98.0 mm
40%
Circumference
1,972 mm
Revs per km
507
Actual dimensions of 245/40R17
| Section width | 245 mm (9.6 in) |
| Sidewall height | 98.0 mm (3.86 in) |
| Rim diameter | 17 in (431.8 mm) |
| Overall diameter | 627.8 mm (24.7 in) |
| Circumference | 1,972 mm |
| Revolutions per km | 507 |
| Inch notation (height x width) | 24.7x9.6R17 |
Worked out: sidewall 245 x 0.4 = 98 mm, rim 17 x 25.4 = 431.8 mm, overall 431.8 + (98 x 2) = 627.8 mm, circumference 3.1416 x 627.8 = 1,972 mm. One turn of the tire moves the car about 1.97 m, which is 507 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 245/40R17 from the factory
No model sold in Thailand in our data leaves the factory on 245/40R17.
Cars that can switch to 245/40R17
These cars leave the factory on another size within 3% of the height of 245/40R17. Whether it fits still depends on rim width and wheel-well clearance.
| Model | Factory size | Height difference | Wheel |
|---|---|---|---|
| Toyota Corolla Altis2019–present | 225/45R17 | −1.02% | Same wheel |
| Honda Civic (FC)2016–2021 | 215/50R17 | −2.94% | Same wheel |
| Honda Civic (FE)2021–present | 215/50R17 | −2.94% | Same wheel |
| MG4 Electric2022–present | 215/50R17 | −2.94% | Same wheel |
| MG5Current model | 215/50R17 | −2.94% | Same wheel |
| MG ZSCurrent model | 215/55R16 | −2.35% | Needs 17-inch wheels |
Sizes that can replace 245/40R17
Sizes within ±3% of the overall height of 245/40R17. “At 100 km/h” is the real speed when the speedometer reads 100.
| Size | Height | Difference | At 100 km/h | Sidewall | Match | Compare |
|---|---|---|---|---|---|---|
| 215/40R18 | 629.2 mm | +1.4 mm (+0.22%) | 100.2 km/h | 86.0 mm | Very close | Compare |
| 215/45R17 | 625.3 mm | −2.5 mm (−0.40%) | 99.6 km/h | 96.8 mm | Very close | Compare |
| 225/50R16 | 631.4 mm | +3.6 mm (+0.57%) | 100.6 km/h | 112.5 mm | Close | Compare |
| 225/45R17 | 634.3 mm | +6.5 mm (+1.04%) | 101.0 km/h | 101.3 mm | Close | Compare |
| 235/40R17 | 619.8 mm | −8.0 mm (−1.27%) | 98.7 km/h | 94.0 mm | Close | Compare |
| 225/40R18 | 637.2 mm | +9.4 mm (+1.50%) | 101.5 km/h | 90.0 mm | Close | Compare |
| 215/55R16 | 642.9 mm | +15.1 mm (+2.41%) | 102.4 km/h | 118.3 mm | Within range | Compare |
| 235/45R17 | 643.3 mm | +15.5 mm (+2.47%) | 102.5 km/h | 105.8 mm | Within range | Compare |
- Keeping your wheels, the closest is 215/45R17 at 625.3 mm, −2.5 mm (−0.40%) from the original. With the speedometer on 100 km/h, the car would actually be doing about 99.6 km/h. Ground clearance drops by about 1.3 mm.
- Moving up to 18-inch wheels, the closest height match is 215/40R18 (+0.22%), with the sidewall dropping from 98.0 mm to 86.0 mm.
- Going down to 16-inch wheels, 225/50R16 (+0.57%) is the closest match and raises the sidewall to 112.5 mm.
- A larger or wider tire also changes acceleration, fuel use and steering weight, so look beyond the percentage.
Buying 245/40R17 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 245/40R17
The code after the size on the sidewall, as in 245/40R17 91V, is the load index and speed symbol. The common ratings for this size:
| Version | Index | Per tire | Four tires |
|---|---|---|---|
| Standard load (SL) | 91 | 615 kg | 2,460 kg |
| Extra load (XL) | 95 | 690 kg | 2,760 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
245/40R17 questions
How tall is a 245/40R17 tire?
About 24.7 inches, or 627.8 mm, from top to bottom before it carries weight. Each sidewall is 98.0 mm tall and the tire is 245 mm (9.6 in) wide.
Which cars use 245/40R17 tires?
No car in our data is fitted with 245/40R17 from the factory, but its height is close to the original size on Toyota Corolla Altis, Honda Civic (FC), Honda Civic (FE), MG4 Electric and MG5, so it works as a replacement size.
Can I fit 215/45R17 instead of 245/40R17?
Size-wise, yes: the height differs by −0.40% (−2.5 mm), so an indicated 100 km/h is really about 99.6 km/h. The tread is 30 mm narrower. Check rim width and load index first.
How much weight can a 245/40R17 tire carry?
Most standard-load versions carry load index 91: 615 kg per tire, 2,460 kg across four. XL versions are rated 95, or 690 kg per tire. Look for the number after the size on the sidewall, as in 245/40R17 91V.
Other 17-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.