265/40R21 vs 295/40R20
295/40R20 is 1.0 mm shorter than 265/40R21 in overall diameter (−0.1%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 295/40R20 fitted, the speedometer reads 100 km/h when you are doing 99.9 km/h.
Dimensions side by side
| 265/40R21 | 295/40R20 | |
|---|---|---|
| Overall diameter | 745 mm (29.3″) | 744 mm (29.3″) |
| Section width | 265 mm | 295 mm |
| Sidewall height | 106 mm | 118 mm |
| Rim | 21″ | 20″ |
| Revolutions per km | 427 | 428 |
| In stock | 33 tires from $295.00 | 12 tires from $309.00 |
What changes
- Overall diameter: 295/40R20 is 1.0 mm shorter (−0.1%).
- Speedometer: reads 100 km/h at an actual 99.9 km/h with 295/40R20.
- 295/40R20 is 30 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 21″ to 20″: 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 265/40R21
Vehicles that use 295/40R20
See every alternate size for 265/40R21
Frequently asked questions
Can I use 295/40R20 instead of 265/40R21?
Usually, yes: 295/40R20 is within 3% of the overall diameter of 265/40R21 (−0.1%). 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 265/40R21 and 295/40R20?
With 295/40R20 instead of 265/40R21, the speedometer shows 100 km/h when you are actually doing 99.9 km/h.
Which vehicles came with both 265/40R21 and 295/40R20?
Both sizes were original equipment, on different trims or packages, on the 2015–2024 Porsche Macan, 2017–2023 Maserati Levante, 2018–2021 Mercedes-Benz GLC 63, 2018–2021 Mercedes-Benz GLC 63 S.