Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/80-15 | 245/85-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.17 (741) | 31.4 (797.5) | 2.22 (56.5) 7.6% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 91.65 (2327.92) | 98.64 (2505.42) | 6.99 (177.5) 7.6% |
| Sidewall Height inches (mm) | 7.09 (180) | 8.2 (208.25) | 1.11 (28.25) 15.7% |
| Revolutions per mile (km) | 691.32 (429.57) | 642.34 (399.13) | -48.98 (-30.43) -7.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.52 mph (34.64 km/h) |
| 25 mph (40.23 km/h) | 26.91 mph (43.3 km/h) |
| 30 mph (48.28 km/h) | 32.29 mph (51.96 km/h) |
| 35 mph (56.33 km/h) | 37.67 mph (60.62 km/h) |
| 40 mph (64.37 km/h) | 43.05 mph (69.28 km/h) |
| 45 mph (72.42 km/h) | 48.43 mph (77.94 km/h) |
| 50 mph (80.47 km/h) | 53.81 mph (86.6 km/h) |
| 55 mph (88.51 km/h) | 59.19 mph (95.26 km/h) |
| 60 mph (96.56 km/h) | 64.57 mph (103.92 km/h) |
| 65 mph (104.61 km/h) | 69.96 mph (112.58 km/h) |
| 70 mph (112.65 km/h) | 75.34 mph (121.24 km/h) |
| 75 mph (120.7 km/h) | 80.72 mph (129.9 km/h) |
| 80 mph (128.75 km/h) | 86.1 mph (138.56 km/h) |
| 85 mph (136.79 km/h) | 91.48 mph (147.22 km/h) |
| 90 mph (144.84 km/h) | 96.86 mph (155.89 km/h) |
| 95 mph (152.89 km/h) | 102.24 mph (164.55 km/h) |
| 100 mph (160.93 km/h) | 107.62 mph (173.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1635 | 1899 | 2045 | 2135 | 2233 | 2302 | 2379 | 2469 | 2595 | 2720 | 2859 | 2970 | 3172 | 3394 | 3568 | 3680 | 3742 | 3972 | 4292 | 4987 |
Better Fuel Economy Factory Ratios Increased Power
