Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 31/10.5-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.98 (786.84) | 29.99 (761.78) | -0.99 (-25.06) -3.2% |
| Width inches (mm) | 10.51 (267) | 9.49 (241) | -1.02 (-26) -9.7% |
| Circum. inches (mm) | 97.32 (2471.93) | 94.22 (2393.2) | -3.1 (-78.73) -3.2% |
| Sidewall Height inches (mm) | 7.99 (202.92) | 7.5 (190.39) | -0.49 (-12.53) -6.2% |
| Revolutions per mile (km) | 651.05 (404.54) | 672.46 (417.85) | 21.42 (13.31) 3.3% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.36 mph (31.16 km/h) |
| 25 mph (40.23 km/h) | 24.2 mph (38.95 km/h) |
| 30 mph (48.28 km/h) | 29.04 mph (46.74 km/h) |
| 35 mph (56.33 km/h) | 33.89 mph (54.53 km/h) |
| 40 mph (64.37 km/h) | 38.73 mph (62.32 km/h) |
| 45 mph (72.42 km/h) | 43.57 mph (70.11 km/h) |
| 50 mph (80.47 km/h) | 48.41 mph (77.9 km/h) |
| 55 mph (88.51 km/h) | 53.25 mph (85.7 km/h) |
| 60 mph (96.56 km/h) | 58.09 mph (93.49 km/h) |
| 65 mph (104.61 km/h) | 62.93 mph (101.28 km/h) |
| 70 mph (112.65 km/h) | 67.77 mph (109.07 km/h) |
| 75 mph (120.7 km/h) | 72.61 mph (116.86 km/h) |
| 80 mph (128.75 km/h) | 77.45 mph (124.65 km/h) |
| 85 mph (136.79 km/h) | 82.29 mph (132.44 km/h) |
| 90 mph (144.84 km/h) | 87.13 mph (140.23 km/h) |
| 95 mph (152.89 km/h) | 91.97 mph (148.02 km/h) |
| 100 mph (160.93 km/h) | 96.82 mph (155.81 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
