285/50R20 vs 285/60R18
285/60R18 is 6.0 mm taller than 285/50R20 in overall diameter (+0.8%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 285/60R18 fitted, the speedometer reads 100 km/h when you are doing 100.8 km/h.
Dimensions side by side
| 285/50R20 | 285/60R18 | |
|---|---|---|
| Overall diameter | 793 mm (31.2″) | 799 mm (31.5″) |
| Section width | 285 mm | 285 mm |
| Sidewall height | 143 mm | 171 mm |
| Rim | 20″ | 18″ |
| Revolutions per km | 401 | 398 |
| In stock | 11 tires from $193.00 | 6 tires from $213.00 |
What changes
- Overall diameter: 285/60R18 is 6.0 mm taller (+0.8%).
- Speedometer: reads 100 km/h at an actual 100.8 km/h with 285/60R18.
- Wheel size changes from 20″ to 18″: 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 285/50R20
Vehicles that use 285/60R18
See every alternate size for 285/50R20
Frequently asked questions
Can I use 285/60R18 instead of 285/50R20?
Usually, yes: 285/60R18 is within 3% of the overall diameter of 285/50R20 (+0.8%). 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 285/50R20 and 285/60R18?
With 285/60R18 instead of 285/50R20, the speedometer shows 100 km/h when you are actually doing 100.8 km/h.
Which vehicles came with both 285/50R20 and 285/60R18?
Both sizes were original equipment, on different trims or packages, on the 2007 Toyota FJ Cruiser.