Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/70-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (696) | 29.99 (761.78) | 2.59 (65.78) 9.5% |
| Width inches (mm) | 8.86 (225) | 9.49 (241) | 0.63 (16) 7.1% |
| Circum. inches (mm) | 86.08 (2186.55) | 94.22 (2393.2) | 8.14 (206.65) 9.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 7.5 (190.39) | 1.29 (32.89) 20.9% |
| Revolutions per mile (km) | 736.02 (457.34) | 672.46 (417.85) | -63.56 (-39.49) -8.6% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.89 mph (35.23 km/h) |
| 25 mph (40.23 km/h) | 27.36 mph (44.04 km/h) |
| 30 mph (48.28 km/h) | 32.84 mph (52.84 km/h) |
| 35 mph (56.33 km/h) | 38.31 mph (61.65 km/h) |
| 40 mph (64.37 km/h) | 43.78 mph (70.46 km/h) |
| 45 mph (72.42 km/h) | 49.25 mph (79.27 km/h) |
| 50 mph (80.47 km/h) | 54.73 mph (88.07 km/h) |
| 55 mph (88.51 km/h) | 60.2 mph (96.88 km/h) |
| 60 mph (96.56 km/h) | 65.67 mph (105.69 km/h) |
| 65 mph (104.61 km/h) | 71.14 mph (114.49 km/h) |
| 70 mph (112.65 km/h) | 76.62 mph (123.3 km/h) |
| 75 mph (120.7 km/h) | 82.09 mph (132.11 km/h) |
| 80 mph (128.75 km/h) | 87.56 mph (140.92 km/h) |
| 85 mph (136.79 km/h) | 93.03 mph (149.72 km/h) |
| 90 mph (144.84 km/h) | 98.51 mph (158.53 km/h) |
| 95 mph (152.89 km/h) | 103.98 mph (167.34 km/h) |
| 100 mph (160.93 km/h) | 109.45 mph (176.14 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 | 1988 | 2141 | 2236 | 2338 | 2410 | 2490 | 2585 | 2716 | 2847 | 2993 | 3109 | 3321 | 3554 | 3736 | 3852 | 3918 | 4158 | 4493 | 5221 |
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