Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 30/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 29.93 (760.14) | -0.43 (-10.86) -1.4% |
| Width inches (mm) | 12.8 (325) | 10.51 (267) | -2.28 (-58) -17.8% |
| Circum. inches (mm) | 95.36 (2422.17) | 94.02 (2388.05) | -1.34 (-34.12) -1.4% |
| Sidewall Height inches (mm) | 7.68 (195) | 7.46 (189.57) | -0.21 (-5.43) -2.8% |
| Revolutions per mile (km) | 664.42 (412.85) | 673.92 (418.75) | 9.49 (5.9) 1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.72 mph (31.73 km/h) |
| 25 mph (40.23 km/h) | 24.65 mph (39.67 km/h) |
| 30 mph (48.28 km/h) | 29.58 mph (47.6 km/h) |
| 35 mph (56.33 km/h) | 34.51 mph (55.53 km/h) |
| 40 mph (64.37 km/h) | 39.44 mph (63.47 km/h) |
| 45 mph (72.42 km/h) | 44.37 mph (71.4 km/h) |
| 50 mph (80.47 km/h) | 49.3 mph (79.33 km/h) |
| 55 mph (88.51 km/h) | 54.23 mph (87.27 km/h) |
| 60 mph (96.56 km/h) | 59.15 mph (95.2 km/h) |
| 65 mph (104.61 km/h) | 64.08 mph (103.13 km/h) |
| 70 mph (112.65 km/h) | 69.01 mph (111.07 km/h) |
| 75 mph (120.7 km/h) | 73.94 mph (119 km/h) |
| 80 mph (128.75 km/h) | 78.87 mph (126.93 km/h) |
| 85 mph (136.79 km/h) | 83.8 mph (134.87 km/h) |
| 90 mph (144.84 km/h) | 88.73 mph (142.8 km/h) |
| 95 mph (152.89 km/h) | 93.66 mph (150.73 km/h) |
| 100 mph (160.93 km/h) | 98.59 mph (158.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1715 | 1992 | 2146 | 2240 | 2343 | 2416 | 2496 | 2591 | 2722 | 2853 | 2999 | 3116 | 3328 | 3561 | 3744 | 3861 | 3926 | 4167 | 4503 | 5233 |
Better Fuel Economy Factory Ratios Increased Power
