Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/70-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.78 (731) | 29.99 (761.78) | 1.21 (30.78) 4.2% |
| Width inches (mm) | 9.84 (250) | 9.49 (241) | -0.35 (-9) -3.6% |
| Circum. inches (mm) | 90.41 (2296.5) | 94.22 (2393.2) | 3.81 (96.7) 4.2% |
| Sidewall Height inches (mm) | 6.89 (175) | 7.5 (190.39) | 0.61 (15.39) 8.8% |
| Revolutions per mile (km) | 700.78 (435.44) | 672.46 (417.85) | -28.32 (-17.59) -4% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.84 mph (33.54 km/h) |
| 25 mph (40.23 km/h) | 26.05 mph (41.93 km/h) |
| 30 mph (48.28 km/h) | 31.26 mph (50.31 km/h) |
| 35 mph (56.33 km/h) | 36.47 mph (58.7 km/h) |
| 40 mph (64.37 km/h) | 41.68 mph (67.08 km/h) |
| 45 mph (72.42 km/h) | 46.89 mph (75.47 km/h) |
| 50 mph (80.47 km/h) | 52.11 mph (83.86 km/h) |
| 55 mph (88.51 km/h) | 57.32 mph (92.24 km/h) |
| 60 mph (96.56 km/h) | 62.53 mph (100.63 km/h) |
| 65 mph (104.61 km/h) | 67.74 mph (109.01 km/h) |
| 70 mph (112.65 km/h) | 72.95 mph (117.4 km/h) |
| 75 mph (120.7 km/h) | 78.16 mph (125.78 km/h) |
| 80 mph (128.75 km/h) | 83.37 mph (134.17 km/h) |
| 85 mph (136.79 km/h) | 88.58 mph (142.55 km/h) |
| 90 mph (144.84 km/h) | 93.79 mph (150.94 km/h) |
| 95 mph (152.89 km/h) | 99 mph (159.33 km/h) |
| 100 mph (160.93 km/h) | 104.21 mph (167.71 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
