Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-15 | 185/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.54 (598) | 25.93 (658.5) | 2.38 (60.5) 10.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 73.96 (1878.67) | 81.45 (2068.74) | 7.48 (190.07) 10.1% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 5.46 (138.75) | 1.19 (30.25) 27.9% |
| Revolutions per mile (km) | 856.64 (532.29) | 777.93 (483.39) | -78.7 (-48.9) -9.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.02 mph (35.44 km/h) |
| 25 mph (40.23 km/h) | 27.53 mph (44.3 km/h) |
| 30 mph (48.28 km/h) | 33.04 mph (53.16 km/h) |
| 35 mph (56.33 km/h) | 38.54 mph (62.03 km/h) |
| 40 mph (64.37 km/h) | 44.05 mph (70.89 km/h) |
| 45 mph (72.42 km/h) | 49.55 mph (79.75 km/h) |
| 50 mph (80.47 km/h) | 55.06 mph (88.61 km/h) |
| 55 mph (88.51 km/h) | 60.56 mph (97.47 km/h) |
| 60 mph (96.56 km/h) | 66.07 mph (106.33 km/h) |
| 65 mph (104.61 km/h) | 71.58 mph (115.19 km/h) |
| 70 mph (112.65 km/h) | 77.08 mph (124.05 km/h) |
| 75 mph (120.7 km/h) | 82.59 mph (132.91 km/h) |
| 80 mph (128.75 km/h) | 88.09 mph (141.77 km/h) |
| 85 mph (136.79 km/h) | 93.6 mph (150.63 km/h) |
| 90 mph (144.84 km/h) | 99.11 mph (159.49 km/h) |
| 95 mph (152.89 km/h) | 104.61 mph (168.36 km/h) |
| 100 mph (160.93 km/h) | 110.12 mph (177.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 | 2300 | 2477 | 2586 | 2704 | 2788 | 2881 | 2991 | 3142 | 3294 | 3462 | 3597 | 3841 | 4111 | 4322 | 4456 | 4532 | 4810 | 5198 | 6040 |
Better Fuel Economy Factory Ratios Increased Power
