Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/75-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.29 (718.5) | 29.99 (761.78) | 1.7 (43.28) 6% |
| Width inches (mm) | 8.86 (225) | 9.49 (241) | 0.63 (16) 7.1% |
| Circum. inches (mm) | 88.87 (2257.23) | 94.22 (2393.2) | 5.35 (135.97) 6% |
| Sidewall Height inches (mm) | 6.64 (168.75) | 7.5 (190.39) | 0.85 (21.64) 12.8% |
| Revolutions per mile (km) | 712.97 (443.02) | 672.46 (417.85) | -40.51 (-25.17) -5.7% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.2 mph (34.13 km/h) |
| 25 mph (40.23 km/h) | 26.51 mph (42.66 km/h) |
| 30 mph (48.28 km/h) | 31.81 mph (51.19 km/h) |
| 35 mph (56.33 km/h) | 37.11 mph (59.72 km/h) |
| 40 mph (64.37 km/h) | 42.41 mph (68.25 km/h) |
| 45 mph (72.42 km/h) | 47.71 mph (76.78 km/h) |
| 50 mph (80.47 km/h) | 53.01 mph (85.31 km/h) |
| 55 mph (88.51 km/h) | 58.31 mph (93.85 km/h) |
| 60 mph (96.56 km/h) | 63.61 mph (102.38 km/h) |
| 65 mph (104.61 km/h) | 68.92 mph (110.91 km/h) |
| 70 mph (112.65 km/h) | 74.22 mph (119.44 km/h) |
| 75 mph (120.7 km/h) | 79.52 mph (127.97 km/h) |
| 80 mph (128.75 km/h) | 84.82 mph (136.5 km/h) |
| 85 mph (136.79 km/h) | 90.12 mph (145.03 km/h) |
| 90 mph (144.84 km/h) | 95.42 mph (153.57 km/h) |
| 95 mph (152.89 km/h) | 100.72 mph (162.1 km/h) |
| 100 mph (160.93 km/h) | 106.02 mph (170.63 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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