Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/75-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.5) | 29.99 (761.78) | 2.29 (58.28) 8.3% |
| Width inches (mm) | 8.46 (215) | 9.49 (241) | 1.02 (26) 12.1% |
| Circum. inches (mm) | 87.01 (2210.11) | 94.22 (2393.2) | 7.21 (183.09) 8.3% |
| Sidewall Height inches (mm) | 6.35 (161.25) | 7.5 (190.39) | 1.15 (29.14) 18.1% |
| Revolutions per mile (km) | 728.17 (452.47) | 672.46 (417.85) | -55.71 (-34.62) -7.7% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.66 mph (34.85 km/h) |
| 25 mph (40.23 km/h) | 27.07 mph (43.57 km/h) |
| 30 mph (48.28 km/h) | 32.49 mph (52.28 km/h) |
| 35 mph (56.33 km/h) | 37.9 mph (60.99 km/h) |
| 40 mph (64.37 km/h) | 43.31 mph (69.71 km/h) |
| 45 mph (72.42 km/h) | 48.73 mph (78.42 km/h) |
| 50 mph (80.47 km/h) | 54.14 mph (87.13 km/h) |
| 55 mph (88.51 km/h) | 59.56 mph (95.85 km/h) |
| 60 mph (96.56 km/h) | 64.97 mph (104.56 km/h) |
| 65 mph (104.61 km/h) | 70.38 mph (113.27 km/h) |
| 70 mph (112.65 km/h) | 75.8 mph (121.99 km/h) |
| 75 mph (120.7 km/h) | 81.21 mph (130.7 km/h) |
| 80 mph (128.75 km/h) | 86.63 mph (139.41 km/h) |
| 85 mph (136.79 km/h) | 92.04 mph (148.13 km/h) |
| 90 mph (144.84 km/h) | 97.46 mph (156.84 km/h) |
| 95 mph (152.89 km/h) | 102.87 mph (165.55 km/h) |
| 100 mph (160.93 km/h) | 108.28 mph (174.27 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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