Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 125/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 24.89 (632.2) | -5.51 (-140) -18.1% |
| Width inches (mm) | 6.89 (175) | 4.92 (125) | -1.97 (-50) -28.6% |
| Circum. inches (mm) | 95.51 (2425.94) | 78.19 (1986.11) | -17.32 (-439.82) -18.1% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 3.44 (87.5) | -2.76 (-70) -44.4% |
| Revolutions per mile (km) | 663.39 (412.21) | 810.3 (503.49) | 146.91 (91.28) 22.1% |
125/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.37 mph (26.35 km/h) |
| 25 mph (40.23 km/h) | 20.47 mph (32.94 km/h) |
| 30 mph (48.28 km/h) | 24.56 mph (39.53 km/h) |
| 35 mph (56.33 km/h) | 28.65 mph (46.12 km/h) |
| 40 mph (64.37 km/h) | 32.75 mph (52.7 km/h) |
| 45 mph (72.42 km/h) | 36.84 mph (59.29 km/h) |
| 50 mph (80.47 km/h) | 40.93 mph (65.88 km/h) |
| 55 mph (88.51 km/h) | 45.03 mph (72.47 km/h) |
| 60 mph (96.56 km/h) | 49.12 mph (79.05 km/h) |
| 65 mph (104.61 km/h) | 53.22 mph (85.64 km/h) |
| 70 mph (112.65 km/h) | 57.31 mph (92.23 km/h) |
| 75 mph (120.7 km/h) | 61.4 mph (98.82 km/h) |
| 80 mph (128.75 km/h) | 65.5 mph (105.41 km/h) |
| 85 mph (136.79 km/h) | 69.59 mph (111.99 km/h) |
| 90 mph (144.84 km/h) | 73.68 mph (118.58 km/h) |
| 95 mph (152.89 km/h) | 77.78 mph (125.17 km/h) |
| 100 mph (160.93 km/h) | 81.87 mph (131.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2062 | 2395 | 2580 | 2694 | 2817 | 2904 | 3001 | 3115 | 3273 | 3431 | 3606 | 3747 | 4001 | 4282 | 4501 | 4642 | 4721 | 5010 | 5414 | 6291 |
Better Fuel Economy Factory Ratios Increased Power
