Tire size
215/75R15 in inches
A 215/75R15 tire is 27.7 inches tall and 8.5 inches wide, on a 15-inch wheel. Written inch-style that is about 27.7x8.5R15 (an equivalent, not a size on sale). It rounds to a 28-inch tire.
| 215/75R15 | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 27.7 in | 704 mm |
| Section width | 8.5 in | 215 mm |
| Sidewall height | 6.3 in | 161 mm |
| Wheel (rim) diameter | 15 in | 381 mm |
| Circumference | 87.0 in | 2210 mm |
| Revolutions | 728 per mile | 452 per km |
How it's worked out
The 75 means the sidewall is 75% of the 215 mm width: 161.2 mm, or 6.35 in. Height = wheel + 2 sidewalls = 15 + 2 x 6.35 = 27.7 in.
Similar sizes
Sizes within about 3.5% of the height of 215/75R15. The last column is your real speed at an indicated 60 mph if your speedometer was set for 215/75R15.
| Size | Height | vs 215/75R15 | Real speed at 60 mph shown |
|---|---|---|---|
| 225/75R15 | 28.3 in | +2.1% | 61.3 mph |
| 225/65R17 | 28.5 in | +3.0% | 61.8 mph |
Going bigger from 215/75R15
If 215/75R15 is your stock size, these are the commonly sold axle ratios that come closest to your stock overall gearing on bigger tires.
| Your ratio now | On 33s | On 35s | On 37s |
|---|---|---|---|
| 3.21 | 3.91 exact 3.82 | 4.10 exact 4.06 | 4.30 exact 4.29 |
| 3.42 | 4.10 exact 4.07 | 4.30 exact 4.32 | 4.56 exact 4.57 |
| 3.55 | 4.30 exact 4.23 | 4.56 exact 4.49 | 4.88 exact 4.74 |
| 3.73 | 4.56 exact 4.44 | 4.56 exact 4.71 | 4.88 exact 4.98 |
| 3.91 | 4.56 exact 4.66 | 4.88 exact 4.94 | 5.29 exact 5.22 |
| 4.10 | 4.88 exact 4.89 | 5.13 exact 5.18 | 5.38 exact 5.48 |
Exact = your ratio x new height / 27.7. Front and rear axles must match on a 4WD. Not every ratio is made for every axle. Want more pull than stock? Go one step shorter. More in the regearing guide.
Questions
How tall is a 215/75R15 tire in inches?
27.7 inches (704 mm). That is the nominal height: the 15-inch wheel plus two 6.35-inch sidewalls.
What is 215/75R15 in inches?
27.7x8.5R15: 27.7 inches tall, 8.5 inches wide, for a 15-inch wheel.
Is 215/75R15 a 28-inch tire?
It measures 27.7 inches on paper, so it rounds to 28. Real tires vary a little by brand, load and wear, so check the maker's spec sheet if a fraction of an inch matters.
How many revolutions per mile does 215/75R15 do?
About 728 per mile (452 per km), from its nominal circumference of 87.0 inches.
Nominal dimensions, calculated from the size marking. Real tires differ slightly by brand, rim width, pressure and wear. Fitment depends on your vehicle, lift and wheels: this page doesn't say whether a size fits. Updated 2026-11-14.