Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 29.5/10.5-15 | 30/9.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.51 (749.46) | 29.99 (761.78) | 0.49 (12.32) 1.6% |
| Width inches (mm) | 10.51 (267) | 9.49 (241) | -1.02 (-26) -9.7% |
| Circum. inches (mm) | 92.7 (2354.5) | 94.22 (2393.2) | 1.52 (38.7) 1.6% |
| Sidewall Height inches (mm) | 7.25 (184.23) | 7.5 (190.39) | 0.24 (6.16) 3.3% |
| Revolutions per mile (km) | 683.52 (424.72) | 672.46 (417.85) | -11.05 (-6.87) -1.6% |
30/9.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.33 mph (32.72 km/h) |
| 25 mph (40.23 km/h) | 25.41 mph (40.9 km/h) |
| 30 mph (48.28 km/h) | 30.49 mph (49.07 km/h) |
| 35 mph (56.33 km/h) | 35.58 mph (57.25 km/h) |
| 40 mph (64.37 km/h) | 40.66 mph (65.43 km/h) |
| 45 mph (72.42 km/h) | 45.74 mph (73.61 km/h) |
| 50 mph (80.47 km/h) | 50.82 mph (81.79 km/h) |
| 55 mph (88.51 km/h) | 55.9 mph (89.97 km/h) |
| 60 mph (96.56 km/h) | 60.99 mph (98.15 km/h) |
| 65 mph (104.61 km/h) | 66.07 mph (106.33 km/h) |
| 70 mph (112.65 km/h) | 71.15 mph (114.51 km/h) |
| 75 mph (120.7 km/h) | 76.23 mph (122.69 km/h) |
| 80 mph (128.75 km/h) | 81.32 mph (130.86 km/h) |
| 85 mph (136.79 km/h) | 86.4 mph (139.04 km/h) |
| 90 mph (144.84 km/h) | 91.48 mph (147.22 km/h) |
| 95 mph (152.89 km/h) | 96.56 mph (155.4 km/h) |
| 100 mph (160.93 km/h) | 101.64 mph (163.58 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
