Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/85-13 | 185/75-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.71 (627.7) | 25.93 (658.5) | 1.21 (30.8) 4.9% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 77.64 (1971.98) | 81.45 (2068.74) | 3.81 (96.76) 4.9% |
| Sidewall Height inches (mm) | 5.86 (148.75) | 5.46 (138.75) | -0.39 (-10) -6.7% |
| Revolutions per mile (km) | 816.11 (507.1) | 777.93 (483.39) | -38.17 (-23.72) -4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.98 mph (33.77 km/h) |
| 25 mph (40.23 km/h) | 26.23 mph (42.21 km/h) |
| 30 mph (48.28 km/h) | 31.47 mph (50.65 km/h) |
| 35 mph (56.33 km/h) | 36.72 mph (59.09 km/h) |
| 40 mph (64.37 km/h) | 41.96 mph (67.53 km/h) |
| 45 mph (72.42 km/h) | 47.21 mph (75.97 km/h) |
| 50 mph (80.47 km/h) | 52.45 mph (84.42 km/h) |
| 55 mph (88.51 km/h) | 57.7 mph (92.86 km/h) |
| 60 mph (96.56 km/h) | 62.94 mph (101.3 km/h) |
| 65 mph (104.61 km/h) | 68.19 mph (109.74 km/h) |
| 70 mph (112.65 km/h) | 73.43 mph (118.18 km/h) |
| 75 mph (120.7 km/h) | 78.68 mph (126.62 km/h) |
| 80 mph (128.75 km/h) | 83.93 mph (135.07 km/h) |
| 85 mph (136.79 km/h) | 89.17 mph (143.51 km/h) |
| 90 mph (144.84 km/h) | 94.42 mph (151.95 km/h) |
| 95 mph (152.89 km/h) | 99.66 mph (160.39 km/h) |
| 100 mph (160.93 km/h) | 104.91 mph (168.83 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
