225/40R18 vs 235/35R19
235/35R19 is 10.0 mm taller than 225/40R18 in overall diameter (+1.6%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 235/35R19 fitted, the speedometer reads 100 km/h when you are doing 101.6 km/h.
Dimensions side by side
| 225/40R18 | 235/35R19 | |
|---|---|---|
| Overall diameter | 637 mm (25.1″) | 647 mm (25.5″) |
| Section width | 225 mm | 235 mm |
| Sidewall height | 90 mm | 82 mm |
| Rim | 18″ | 19″ |
| Revolutions per km | 500 | 492 |
| In stock | 77 tires from $110.00 | 31 tires from $111.00 |
What changes
- Overall diameter: 235/35R19 is 10.0 mm taller (+1.6%).
- Speedometer: reads 100 km/h at an actual 101.6 km/h with 235/35R19.
- 235/35R19 is 10 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 18″ to 19″: you need wheels in the new size.
- Choose a load index at least as high as the one on your door placard.
Vehicles that came with both sizes
Vehicles that use 225/40R18
Vehicles that use 235/35R19
See every alternate size for 225/40R18
Frequently asked questions
Can I use 235/35R19 instead of 225/40R18?
Usually, yes: 235/35R19 is within 3% of the overall diameter of 225/40R18 (+1.6%). Use wheels of the right size and width, match or exceed the original load index, and check clearance at full steering lock.
How much does the speedometer change between 225/40R18 and 235/35R19?
With 235/35R19 instead of 225/40R18, the speedometer shows 100 km/h when you are actually doing 101.6 km/h.
Which vehicles came with both 225/40R18 and 235/35R19?
Both sizes were original equipment, on different trims or packages, on the 2015–2020, 2022–2024 Audi S3, 2020–2024 BMW 228i, 2020–2024 Mini Clubman, 2020–2024 Mini Cooper, 2021–2024 BMW M235i, 2014–2020 Audi A3.