Tire Ruler215/85R16 dimensions
| Overall diameter (height) | 30.39″ · 772 mm |
| Section width | 8.46″ · 215 mm |
| Sidewall height | 7.19″ · 183 mm |
| Wheel diameter | 16″ |
| Rim width (rule of thumb) | 6–7.5″ |
| Circumference | 95.5″ |
| Revolutions per mile | 664 |
| In inches (flotation style) | 30.4 × 8.5R16 |
How it’s calculated: the sidewall is 85% of the 215 mm width = 182.8 mm (7.19″). Add two sidewalls to the 16″ wheel: 16 + 2 × 7.19 = 30.39″.
Bigger tires than 215/85R16 on 16″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 265/70R16 | 30.6″ | +0.22″ (+0.7%) | 60.4 mph |
| 265/75R16 | 31.6″ | +1.26″ (+4.1%) | 62.5 mph |
| 235/85R16 | 31.7″ | +1.34″ (+4.4%) | 62.6 mph |
“60 mph reads” is your real speed when a speedometer set up for 215/85R16 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Sizes equivalent to 215/85R16
Within 1.5% of the same height on a 16″ wheel. Usually interchangeable for the speedometer; check width, load index and clearance.
| Size | Height | Width | Difference |
|---|---|---|---|
| 245/75R16 | 30.5″ | 9.6″ | +0.3% |
| 265/70R16 | 30.6″ | 10.4″ | +0.7% |
| 255/70R16 | 30.1″ | 10.0″ | −1.1% |
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 30x9.50R15: 30.0″ tall on a 15″ wheel (−1.3%)
- 245/70R17: 30.5″ tall on a 17″ wheel (+0.4%)
- 265/65R17: 30.6″ tall on a 17″ wheel (+0.6%)
- 255/65R17: 30.1″ tall on a 17″ wheel (−1.1%)
- 235/70R17: 30.0″ tall on a 17″ wheel (−1.4%)
- 265/60R18: 30.5″ tall on an 18″ wheel (+0.4%)
- 235/65R18: 30.0″ tall on an 18″ wheel (−1.2%)
- 245/65R18: 30.5″ tall on an 18″ wheel (+0.5%)
- 255/55R19: 30.0″ tall on a 19″ wheel (−1.1%)
- 265/50R20: 30.4″ tall on a 20″ wheel (+0.1%)
- 255/50R20: 30.0″ tall on a 20″ wheel (−1.2%)
- 275/50R20: 30.8″ tall on a 20″ wheel (+1.4%)
- 265/45R21: 30.4″ tall on a 21″ wheel (±0.0%)
- 275/45R21: 30.7″ tall on a 21″ wheel (+1.2%)
- 265/40R22: 30.3″ tall on a 22″ wheel (−0.1%)
Popular 215/85R16 comparisons
Frequently asked questions
Is 215/85R16 a 30 inch tire?
Not quite. 215/85R16 is 30.39 inches tall, between a 30 and a 31 inch tire.
What size is 215/85R16 in inches?
215/85R16 is 30.4 inches tall (overall diameter), 8.5 inches wide, with a 7.2 inch sidewall, and fits a 16 inch wheel.
What tire size is equivalent to 215/85R16?
Sizes within 1.5% of the same diameter on a 16" wheel: 245/75R16 (30.5"), 265/70R16 (30.6"), 255/70R16 (30.1"). Check load index and width before swapping.
What rim width fits 215/85R16?
As a rule of thumb, about 6–7.5 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 215/85R16 make?
About 664 revolutions per mile in theory (circumference 95.5 in). Real tires turn slightly more because they flatten under load.