Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/70-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 29.99 (761.78) | 3.14 (79.78) 11.7% |
| Width inches (mm) | 8.46 (215) | 9.49 (241) | 1.02 (26) 12.1% |
| Circum. inches (mm) | 84.35 (2142.57) | 94.22 (2393.2) | 9.87 (250.64) 11.7% |
| Sidewall Height inches (mm) | 5.93 (150.5) | 7.5 (190.39) | 1.57 (39.89) 26.5% |
| Revolutions per mile (km) | 751.13 (466.73) | 672.46 (417.85) | -78.66 (-48.88) -10.5% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.95 km/h) |
| 25 mph (40.23 km/h) | 27.92 mph (44.94 km/h) |
| 30 mph (48.28 km/h) | 33.51 mph (53.93 km/h) |
| 35 mph (56.33 km/h) | 39.09 mph (62.92 km/h) |
| 40 mph (64.37 km/h) | 44.68 mph (71.9 km/h) |
| 45 mph (72.42 km/h) | 50.26 mph (80.89 km/h) |
| 50 mph (80.47 km/h) | 55.85 mph (89.88 km/h) |
| 55 mph (88.51 km/h) | 61.43 mph (98.87 km/h) |
| 60 mph (96.56 km/h) | 67.02 mph (107.86 km/h) |
| 65 mph (104.61 km/h) | 72.6 mph (116.84 km/h) |
| 70 mph (112.65 km/h) | 78.19 mph (125.83 km/h) |
| 75 mph (120.7 km/h) | 83.77 mph (134.82 km/h) |
| 80 mph (128.75 km/h) | 89.36 mph (143.81 km/h) |
| 85 mph (136.79 km/h) | 94.94 mph (152.8 km/h) |
| 90 mph (144.84 km/h) | 100.53 mph (161.78 km/h) |
| 95 mph (152.89 km/h) | 106.11 mph (170.77 km/h) |
| 100 mph (160.93 km/h) | 111.7 mph (179.76 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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