215/85R15 tire size
215/85R15 is a metric size: 29.4" tall, 8.5" wide, on a 15" rim — about a 29.5x8.50R15. The sidewall is 7.2" and the tire turns 686 times per mile.
215/85R15 specs
| Overall diameter (height) | 29.39" · 747 mm |
|---|---|
| Section width | 8.46" · 215 mm |
| Sidewall height | 7.19" · 183 mm (85% of width) |
| Rim diameter | 15" |
| Circumference | 92.33" · 2.345 m |
| Revolutions per mile | 686 (426 per km) |
| Inch (flotation) equivalent | 29.5x8.50R15 |
Equivalent sizes on a 15" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/75R15 common | 28.88" | -1.74% | +20 mm | 59.0 mph | calculate → |
| 30x9.50R15 | 30.00" | +2.08% | +26 mm | 61.2 mph | calculate → |
| 225/75R15 | 28.29" | -3.75% | +10 mm | 57.7 mph | calculate → |
| 235/70R15 | 27.95" | -4.89% | +20 mm | 57.1 mph | calculate → |
| 255/70R15 | 29.06" | -1.14% | +40 mm | 59.3 mph | calculate → |
| 265/70R15 | 29.61" | +0.74% | +50 mm | 60.4 mph | calculate → |
| 265/75R15 | 30.65" | +4.29% | +50 mm | 62.6 mph | calculate → |
| 275/60R15 | 27.99" | -4.76% | +60 mm | 57.1 mph | calculate → |
| 29x10.50R15 | 29.00" | -1.33% | +52 mm | 59.2 mph | calculate → |
| 295/65R15 | 30.10" | +2.41% | +80 mm | 61.4 mph | calculate → |
| 30x11.50R15 | 30.00" | +2.08% | +77 mm | 61.2 mph | calculate → |
| 28x10.50R15 | 28.00" | -4.73% | +52 mm | 57.2 mph | calculate → |
| 28x11.50R15 | 28.00" | -4.73% | +77 mm | 57.2 mph | calculate → |
| 28x9.00R15 | 28.00" | -4.73% | +14 mm | 57.2 mph | calculate → |
| 29.5x10.50R15 | 29.50" | +0.38% | +52 mm | 60.2 mph | calculate → |
| 29.5x11.50R15 | 29.50" | +0.38% | +77 mm | 60.2 mph | calculate → |
| 29.5x13.50R15 | 29.50" | +0.38% | +128 mm | 60.2 mph | calculate → |
| 29.5x9.00R15 | 29.50" | +0.38% | +14 mm | 60.2 mph | calculate → |
| 29x11.50R15 | 29.00" | -1.33% | +77 mm | 59.2 mph | calculate → |
| 29x15.00R15 | 29.00" | -1.33% | +166 mm | 59.2 mph | calculate → |
| 29x18.00R15 | 29.00" | -1.33% | +242 mm | 59.2 mph | calculate → |
| 29x8.50R15 | 29.00" | -1.33% | +1 mm | 59.2 mph | calculate → |
| 30x10.50R15 | 30.00" | +2.08% | +52 mm | 61.2 mph | calculate → |
| 30x10.00R15 | 30.00" | +2.08% | +39 mm | 61.2 mph | calculate → |
| 30x12.00R15 | 30.00" | +2.08% | +90 mm | 61.2 mph | calculate → |
| 30x9.00R15 | 30.00" | +2.08% | +14 mm | 61.2 mph | calculate → |
| 255/75R15 | 30.06" | +2.28% | +40 mm | 61.4 mph | calculate → |
| 28x10.00R15 | 28.00" | -4.73% | +39 mm | 57.2 mph | calculate → |
| 28x12.00R15 | 28.00" | -4.73% | +90 mm | 57.2 mph | calculate → |
| 28x6.00R15 | 28.00" | -4.73% | -63 mm | 57.2 mph | calculate → |
| 28x7.50R15 | 28.00" | -4.73% | -24 mm | 57.2 mph | calculate → |
| 29x12.50R15 | 29.00" | -1.33% | +103 mm | 59.2 mph | calculate → |
| 29x15.50R15 | 29.00" | -1.33% | +179 mm | 59.2 mph | calculate → |
| 29x18.50R15 | 29.00" | -1.33% | +255 mm | 59.2 mph | calculate → |
| 315/60R15 | 29.88" | +1.67% | +100 mm | 61.0 mph | calculate → |
| 30x12.50R15 | 30.00" | +2.08% | +103 mm | 61.2 mph | calculate → |
| 30x13.50R15 | 30.00" | +2.08% | +128 mm | 61.2 mph | calculate → |
| 30x7.00R15 | 30.00" | +2.08% | -37 mm | 61.2 mph | calculate → |
| 245/70R15 | 28.50" | -3.01% | +30 mm | 58.2 mph | calculate → |
| 255/65R15 | 28.05" | -4.55% | +40 mm | 57.3 mph | calculate → |
| 28x12.50R15 | 28.00" | -4.73% | +103 mm | 57.2 mph | calculate → |
| 28x13.50R15 | 28.00" | -4.73% | +128 mm | 57.2 mph | calculate → |
Plus / minus sizing: 14" and 16" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 225/75R16 common | 29.29" | -0.35% | +10 mm | 59.8 mph | calculate → |
| 245/70R16 common | 29.50" | +0.39% | +30 mm | 60.2 mph | calculate → |
| 285/60R16 | 29.46" | +0.25% | +70 mm | 60.2 mph | calculate → |
Try another size against 215/85R15
Questions
What size is 215/85R15 in inches?
215/85R15 is about 29.4" tall and 8.5" wide on a 15-inch rim — roughly a 29.5x8.50R15 in inch sizing.
What does 215/85R15 mean?
215 mm section width, sidewall 85% of the width (7.19"), radial construction, 15-inch rim.
What tire sizes are equivalent to 215/85R15?
On the same 15" rim, within 3% of the diameter: 29.5x10.50R15 (+0.38%), 29.5x11.50R15 (+0.38%), 29.5x13.50R15 (+0.38%), 29.5x9.00R15 (+0.38%), 265/70R15 (+0.74%), 255/70R15 (-1.14%).
How many revolutions per mile does a 215/85R15 tire make?
About 686 revolutions per mile (circumference 92.3").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.