Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 250/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 27.84 (707.2) | -2.56 (-65) -8.4% |
| Width inches (mm) | 6.89 (175) | 9.84 (250) | 2.95 (75) 42.9% |
| Circum. inches (mm) | 95.51 (2425.94) | 87.47 (2221.73) | -8.04 (-204.2) -8.4% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 4.92 (125) | -1.28 (-32.5) -20.6% |
| Revolutions per mile (km) | 663.39 (412.21) | 724.36 (450.1) | 60.97 (37.89) 9.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.32 mph (29.48 km/h) |
| 25 mph (40.23 km/h) | 22.9 mph (36.85 km/h) |
| 30 mph (48.28 km/h) | 27.47 mph (44.22 km/h) |
| 35 mph (56.33 km/h) | 32.05 mph (51.59 km/h) |
| 40 mph (64.37 km/h) | 36.63 mph (58.96 km/h) |
| 45 mph (72.42 km/h) | 41.21 mph (66.32 km/h) |
| 50 mph (80.47 km/h) | 45.79 mph (73.69 km/h) |
| 55 mph (88.51 km/h) | 50.37 mph (81.06 km/h) |
| 60 mph (96.56 km/h) | 54.95 mph (88.43 km/h) |
| 65 mph (104.61 km/h) | 59.53 mph (95.8 km/h) |
| 70 mph (112.65 km/h) | 64.11 mph (103.17 km/h) |
| 75 mph (120.7 km/h) | 68.69 mph (110.54 km/h) |
| 80 mph (128.75 km/h) | 73.27 mph (117.91 km/h) |
| 85 mph (136.79 km/h) | 77.85 mph (125.28 km/h) |
| 90 mph (144.84 km/h) | 82.42 mph (132.65 km/h) |
| 95 mph (152.89 km/h) | 87 mph (140.02 km/h) |
| 100 mph (160.93 km/h) | 91.58 mph (147.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1843 | 2141 | 2306 | 2408 | 2518 | 2596 | 2683 | 2785 | 2926 | 3067 | 3224 | 3349 | 3577 | 3828 | 4024 | 4150 | 4220 | 4479 | 4840 | 5624 |
Better Fuel Economy Factory Ratios Increased Power
