285/65R18 vs 35x12.50R18
35x12.50R18 is 7.4% taller (+2.41 in) and 1.28 in wider than 285/65R18.
35x12.50R18 is 7.4% taller than 285/65R18. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.
| 285/65R18 | 35x12.50R18 | Change | |
|---|---|---|---|
| Diameter | 32.59″ | 35.00″ | +2.41″+7.4% |
| Width | 11.22″ | 12.50″ | +1.28″+11.4% |
| Sidewall | 7.29″ | 8.50″ | +1.21″+16.5% |
| Circumference | 102.4″ | 110.0″ | +7.6″+7.4% |
| Wheel | 18″ | 18″ | Same |
| Revs per mile | 619 | 576 | −43 |
Real speed on 35x12.50R18.
Change in height under the axle.
On the same wheel, split inboard and outboard.
Shop 35x12.50R18 tires
Opens the store’s own searchPrices and stock change often, so check a few stores. We don’t earn anything from these links.
285/65R18 or 35x12.50R18?
Can I use 35x12.50R18 instead of 285/65R18?
35x12.50R18 is 7.4% taller than 285/65R18. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.
Will my speedometer be off?
At an indicated 60 mph on 35x12.50R18 you are really doing 64.4 mph if the speedometer was set up for 285/65R18. Going the other way, 285/65R18 would make it read 55.9 mph at a real 60.
How much ground clearance does it change?
Half the diameter difference: +1.21 in (+31 mm) under the axle.