tireheight.com285/75R16 vs 315/75R16
315/75R16 is 1.7″ taller than 285/75R16 on average, going by the heights their makers list (32.9″ vs 34.6″). On paper the gap is 1.77″.
What changes
Going from 285/75R16 to 315/75R16.
Lift is half the height difference, since the axle sits at the middle of the tire. The speedometer figure assumes it was set for 285/75R16 and uses the revolutions per mile the makers publish: at an indicated 60 mph you'd be doing 63.2 mph.
Side by side
| 285/75R16 | 315/75R16 | Difference | |
|---|---|---|---|
| Listed height ″ | 32.80–33.19 | 34.50–34.88 | +1.74 |
| Size code height ″ | 32.83 | 34.60 | +1.77 |
| Height under load ″ | 31.9 | 33.6 | +1.7 |
| Width ″ | 11.22 | 12.40 | +1.18 |
| Listed width ″ | 11.2–11.7 | 11.9–12.9 | +1.1 |
| Sidewall ″ | 8.42 | 9.30 | +0.89 |
| Wheel ″ | 16 | 16 | same |
| Weight lb | 52.7–67.0 | 64.0–80.6 | +9.8 |
| Tread depth /32″ | 14–19 | 16–21 | +1.1 |
| Tires listed | 18 | 8 |
Tires sold in both sizes
The same model in each size, by the heights the maker lists. Averages where a model comes in several load ranges.
| Tire | 285/75R16 ″ | 315/75R16 ″ | Taller by | Heavier by |
|---|---|---|---|---|
| BFGoodrich All-Terrain T/A KO3 | 32.80 | 34.60 | +1.80″ | +10.0 lb |
| BFGoodrich Mud-Terrain T/A KM3 | 32.80 | 34.60 | +1.80″ | +9.0 lb |
| General Grabber A/TX | 32.80 | 34.60 | +1.80″ | +9.3 lb |
| Mickey Thompson Baja Boss M/T | 33.00 | 34.50 | +1.50″ | +10.0 lb |
| Mickey Thompson Baja Legend EXP | 33.00 | 34.80 | +1.80″ | +7.0 lb |
| Mickey Thompson Baja Legend MTZ | 33.00 | 34.50 | +1.50″ | +8.0 lb |
| Toyo Open Country A/T III | 32.95 | 34.57 | +1.61″ | +7.9 lb |
| Toyo Open Country M/T | 33.03 | 34.88 | +1.85″ | +13.6 lb |
Questions about 285/75R16 vs 315/75R16
How much taller is 315/75R16 than 285/75R16?
1.74″ on average, going by the heights tire makers list: 285/75R16 tires are listed at 32.80–33.19″ and 315/75R16 at 34.50–34.88″. The size codes work out to 32.83″ and 34.60″, a 1.77″ difference.
How much lift does 315/75R16 give over 285/75R16?
The tire's radius grows by 0.87″, so the axle sits about 0.87″ higher, and the top of the tread comes 0.87″ closer to the fender. 315/75R16 is also 1.18″ wider on paper, 0.59″ per side on the same wheel. Whether it fits depends on your vehicle, lift and wheel offset.
Will my speedometer be off with 315/75R16 instead of 285/75R16?
Yes. If it's set for 285/75R16, it will read about 5.4% slow: at an indicated 60 mph you'll be doing 63.2 mph. Worked out from the revolutions per mile the makers publish.
Can 315/75R16 go on the same wheel as 285/75R16?
Both fit a 16-inch wheel. Wheel widths approved for both run from 8.0″ to 9.5″.