Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 125/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 23.91 (607.2) | -6.5 (-165) -21.4% |
| Width inches (mm) | 6.89 (175) | 4.92 (125) | -1.97 (-50) -28.6% |
| Circum. inches (mm) | 95.51 (2425.94) | 75.1 (1907.58) | -20.41 (-518.36) -21.4% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 2.95 (75) | -3.25 (-82.5) -52.4% |
| Revolutions per mile (km) | 663.39 (412.21) | 843.66 (524.22) | 180.27 (112.01) 27.2% |
125/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 15.73 mph (25.31 km/h) |
| 25 mph (40.23 km/h) | 19.66 mph (31.64 km/h) |
| 30 mph (48.28 km/h) | 23.59 mph (37.96 km/h) |
| 35 mph (56.33 km/h) | 27.52 mph (44.29 km/h) |
| 40 mph (64.37 km/h) | 31.45 mph (50.62 km/h) |
| 45 mph (72.42 km/h) | 35.38 mph (56.95 km/h) |
| 50 mph (80.47 km/h) | 39.32 mph (63.27 km/h) |
| 55 mph (88.51 km/h) | 43.25 mph (69.6 km/h) |
| 60 mph (96.56 km/h) | 47.18 mph (75.93 km/h) |
| 65 mph (104.61 km/h) | 51.11 mph (82.26 km/h) |
| 70 mph (112.65 km/h) | 55.04 mph (88.58 km/h) |
| 75 mph (120.7 km/h) | 58.97 mph (94.91 km/h) |
| 80 mph (128.75 km/h) | 62.91 mph (101.24 km/h) |
| 85 mph (136.79 km/h) | 66.84 mph (107.56 km/h) |
| 90 mph (144.84 km/h) | 70.77 mph (113.89 km/h) |
| 95 mph (152.89 km/h) | 74.7 mph (120.22 km/h) |
| 100 mph (160.93 km/h) | 78.63 mph (126.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2147 | 2494 | 2686 | 2805 | 2933 | 3024 | 3125 | 3243 | 3408 | 3572 | 3755 | 3901 | 4166 | 4458 | 4687 | 4833 | 4915 | 5217 | 5637 | 6550 |
Better Fuel Economy Factory Ratios Increased Power
