Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 175/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 25.33 (643.5) | 3.62 (92) 16.7% |
| Width inches (mm) | 6.1 (155) | 6.89 (175) | 0.79 (20) 12.9% |
| Circum. inches (mm) | 68.21 (1732.59) | 79.59 (2021.61) | 11.38 (289.03) 16.7% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 5.17 (131.25) | 1.81 (46) 54% |
| Revolutions per mile (km) | 928.87 (577.17) | 796.07 (494.65) | -132.8 (-82.52) -14.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.34 mph (37.56 km/h) |
| 25 mph (40.23 km/h) | 29.17 mph (46.95 km/h) |
| 30 mph (48.28 km/h) | 35 mph (56.33 km/h) |
| 35 mph (56.33 km/h) | 40.84 mph (65.72 km/h) |
| 40 mph (64.37 km/h) | 46.67 mph (75.11 km/h) |
| 45 mph (72.42 km/h) | 52.51 mph (84.5 km/h) |
| 50 mph (80.47 km/h) | 58.34 mph (93.89 km/h) |
| 55 mph (88.51 km/h) | 64.17 mph (103.28 km/h) |
| 60 mph (96.56 km/h) | 70.01 mph (112.67 km/h) |
| 65 mph (104.61 km/h) | 75.84 mph (122.06 km/h) |
| 70 mph (112.65 km/h) | 81.68 mph (131.45 km/h) |
| 75 mph (120.7 km/h) | 87.51 mph (140.84 km/h) |
| 80 mph (128.75 km/h) | 93.35 mph (150.23 km/h) |
| 85 mph (136.79 km/h) | 99.18 mph (159.61 km/h) |
| 90 mph (144.84 km/h) | 105.01 mph (169 km/h) |
| 95 mph (152.89 km/h) | 110.85 mph (178.39 km/h) |
| 100 mph (160.93 km/h) | 116.68 mph (187.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2353 | 2534 | 2647 | 2767 | 2853 | 2948 | 3060 | 3215 | 3371 | 3543 | 3681 | 3931 | 4207 | 4422 | 4560 | 4638 | 4922 | 5319 | 6181 |
Better Fuel Economy Factory Ratios Increased Power
