Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/65-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.05 (712.5) | 29.99 (761.78) | 1.94 (49.28) 6.9% |
| Width inches (mm) | 10.04 (255) | 9.49 (241) | -0.55 (-14) -5.5% |
| Circum. inches (mm) | 88.13 (2238.38) | 94.22 (2393.2) | 6.1 (154.82) 6.9% |
| Sidewall Height inches (mm) | 6.53 (165.75) | 7.5 (190.39) | 0.97 (24.64) 14.9% |
| Revolutions per mile (km) | 718.98 (446.75) | 672.46 (417.85) | -46.51 (-28.9) -6.5% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.38 mph (34.41 km/h) |
| 25 mph (40.23 km/h) | 26.73 mph (43.02 km/h) |
| 30 mph (48.28 km/h) | 32.07 mph (51.62 km/h) |
| 35 mph (56.33 km/h) | 37.42 mph (60.22 km/h) |
| 40 mph (64.37 km/h) | 42.77 mph (68.83 km/h) |
| 45 mph (72.42 km/h) | 48.11 mph (77.43 km/h) |
| 50 mph (80.47 km/h) | 53.46 mph (86.03 km/h) |
| 55 mph (88.51 km/h) | 58.8 mph (94.64 km/h) |
| 60 mph (96.56 km/h) | 64.15 mph (103.24 km/h) |
| 65 mph (104.61 km/h) | 69.5 mph (111.84 km/h) |
| 70 mph (112.65 km/h) | 74.84 mph (120.45 km/h) |
| 75 mph (120.7 km/h) | 80.19 mph (129.05 km/h) |
| 80 mph (128.75 km/h) | 85.53 mph (137.65 km/h) |
| 85 mph (136.79 km/h) | 90.88 mph (146.26 km/h) |
| 90 mph (144.84 km/h) | 96.22 mph (154.86 km/h) |
| 95 mph (152.89 km/h) | 101.57 mph (163.46 km/h) |
| 100 mph (160.93 km/h) | 106.92 mph (172.07 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 |
Better Fuel Economy Factory Ratios Increased Power
