28x7.50R15 tire size
28x7.50R15 is a flotation (inch) size: 28.0" tall, 7.5" wide, on a 15" rim — about a 190/85R15. The sidewall is 6.5" and the tire turns 720 times per mile.
28x7.50R15 specs
| Overall diameter (height) | 28.00" · 711 mm |
|---|---|
| Section width | 7.50" · 191 mm |
| Sidewall height | 6.50" · 165 mm (87% of width) |
| Rim diameter | 15" |
| Circumference | 87.96" · 2.234 m |
| Revolutions per mile | 720 (448 per km) |
| Closest metric size | 190/85R15 |
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" | +3.14% | +44 mm | 61.9 mph | calculate → |
| 215/70R15 | 26.85" | -4.11% | +24 mm | 57.5 mph | calculate → |
| 215/75R15 | 27.70" | -1.08% | +24 mm | 59.4 mph | calculate → |
| 225/70R15 | 27.40" | -2.14% | +34 mm | 58.7 mph | calculate → |
| 225/75R15 | 28.29" | +1.03% | +34 mm | 60.6 mph | calculate → |
| 235/70R15 | 27.95" | -0.17% | +44 mm | 59.9 mph | calculate → |
| 205/75R15 | 27.11" | -3.19% | +14 mm | 58.1 mph | calculate → |
| 255/70R15 | 29.06" | +3.77% | +64 mm | 62.3 mph | calculate → |
| 275/60R15 | 27.99" | -0.03% | +84 mm | 60.0 mph | calculate → |
| 255/60R15 | 27.05" | -3.40% | +64 mm | 58.0 mph | calculate → |
| 295/50R15 | 26.61" | -4.95% | +104 mm | 57.0 mph | calculate → |
| 325/50R15 | 27.80" | -0.73% | +134 mm | 59.6 mph | calculate → |
| 29x10.50R15 | 29.00" | +3.57% | +76 mm | 62.1 mph | calculate → |
| 28x10.50R15 | 28.00" | 0.00% | +76 mm | 60.0 mph | calculate → |
| 28x11.50R15 | 28.00" | 0.00% | +101 mm | 60.0 mph | calculate → |
| 28x9.00R15 | 28.00" | 0.00% | +38 mm | 60.0 mph | calculate → |
| 295/55R15 | 27.78" | -0.80% | +104 mm | 59.5 mph | calculate → |
| 28x10.00R15 | 28.00" | 0.00% | +63 mm | 60.0 mph | calculate → |
| 28x12.00R15 | 28.00" | 0.00% | +114 mm | 60.0 mph | calculate → |
| 28x6.00R15 | 28.00" | 0.00% | -39 mm | 60.0 mph | calculate → |
| 27x9.50R15 | 27.00" | -3.57% | +50 mm | 57.9 mph | calculate → |
| 29x11.50R15 | 29.00" | +3.57% | +101 mm | 62.1 mph | calculate → |
| 29x15.00R15 | 29.00" | +3.57% | +190 mm | 62.1 mph | calculate → |
| 29x18.00R15 | 29.00" | +3.57% | +266 mm | 62.1 mph | calculate → |
| 29x8.50R15 | 29.00" | +3.57% | +25 mm | 62.1 mph | calculate → |
| 215/85R15 | 29.39" | +4.96% | +24 mm | 63.0 mph | calculate → |
| 28x12.50R15 | 28.00" | 0.00% | +127 mm | 60.0 mph | calculate → |
| 28x13.50R15 | 28.00" | 0.00% | +152 mm | 60.0 mph | calculate → |
| 255/65R15 | 28.05" | +0.18% | +64 mm | 60.1 mph | calculate → |
| 245/70R15 | 28.50" | +1.80% | +54 mm | 61.1 mph | calculate → |
| 235/65R15 | 27.03" | -3.47% | +44 mm | 57.9 mph | calculate → |
| 27x10.50R15 | 27.00" | -3.57% | +76 mm | 57.9 mph | calculate → |
| 29x12.50R15 | 29.00" | +3.57% | +127 mm | 62.1 mph | calculate → |
| 29x15.50R15 | 29.00" | +3.57% | +203 mm | 62.1 mph | calculate → |
| 29x18.50R15 | 29.00" | +3.57% | +279 mm | 62.1 mph | calculate → |
| 185R15 | 26.94" | -3.77% | -6 mm | 57.7 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 | |
|---|---|---|---|---|---|
| 215/70R16 common | 27.85" | -0.53% | +24 mm | 59.7 mph | calculate → |
| 235/65R16 common | 28.03" | +0.10% | +44 mm | 60.1 mph | calculate → |
| 205/75R16 | 28.11" | +0.38% | +14 mm | 60.2 mph | calculate → |
| 28x10.00R14 | 28.00" | 0.00% | +63 mm | 60.0 mph | calculate → |
| 28x11.00R14 | 28.00" | 0.00% | +88 mm | 60.0 mph | calculate → |
| 28x8.50R14 | 28.00" | 0.00% | +25 mm | 60.0 mph | calculate → |
| 28x11.50R16 | 28.00" | 0.00% | +101 mm | 60.0 mph | calculate → |
| 255/60R16 | 28.05" | +0.17% | +64 mm | 60.1 mph | calculate → |
Try another size against 28x7.50R15
Questions
What size is 28x7.50R15 in inches?
28x7.50R15 is about 28.0" tall and 7.5" wide on a 15-inch rim — roughly a 190/85R15 in inch sizing.
What does 28x7.50R15 mean?
28" overall diameter, 7.50" section width, radial, 15" rim.
What tire sizes are equivalent to 28x7.50R15?
On the same 15" rim, within 3% of the diameter: 28x10.50R15 (0.00%), 28x10.00R15 (0.00%), 28x11.50R15 (0.00%), 28x12.50R15 (0.00%), 28x12.00R15 (0.00%), 28x13.50R15 (0.00%).
How many revolutions per mile does a 28x7.50R15 tire make?
About 720 revolutions per mile (circumference 88.0").
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.