Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-15 | 155/85-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.54 (598) | 25.37 (644.5) | 1.83 (46.5) 7.8% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 73.96 (1878.67) | 79.71 (2024.76) | 5.75 (146.08) 7.8% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.19 (131.75) | 0.92 (23.25) 21.4% |
| Revolutions per mile (km) | 856.64 (532.29) | 794.83 (493.89) | -61.81 (-38.4) -7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.56 mph (34.69 km/h) |
| 25 mph (40.23 km/h) | 26.94 mph (43.36 km/h) |
| 30 mph (48.28 km/h) | 32.33 mph (52.03 km/h) |
| 35 mph (56.33 km/h) | 37.72 mph (60.71 km/h) |
| 40 mph (64.37 km/h) | 43.11 mph (69.38 km/h) |
| 45 mph (72.42 km/h) | 48.5 mph (78.05 km/h) |
| 50 mph (80.47 km/h) | 53.89 mph (86.72 km/h) |
| 55 mph (88.51 km/h) | 59.28 mph (95.4 km/h) |
| 60 mph (96.56 km/h) | 64.67 mph (104.07 km/h) |
| 65 mph (104.61 km/h) | 70.05 mph (112.74 km/h) |
| 70 mph (112.65 km/h) | 75.44 mph (121.41 km/h) |
| 75 mph (120.7 km/h) | 80.83 mph (130.09 km/h) |
| 80 mph (128.75 km/h) | 86.22 mph (138.76 km/h) |
| 85 mph (136.79 km/h) | 91.61 mph (147.43 km/h) |
| 90 mph (144.84 km/h) | 97 mph (156.1 km/h) |
| 95 mph (152.89 km/h) | 102.39 mph (164.78 km/h) |
| 100 mph (160.93 km/h) | 107.78 mph (173.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 2350 | 2531 | 2642 | 2763 | 2849 | 2944 | 3056 | 3210 | 3365 | 3538 | 3675 | 3925 | 4200 | 4416 | 4553 | 4631 | 4915 | 5311 | 6171 |
Better Fuel Economy Factory Ratios Increased Power
