Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/55-17 | 125/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.31 (668.3) | 24.89 (632.2) | -1.42 (-36.1) -5.4% |
| Width inches (mm) | 8.46 (215) | 4.92 (125) | -3.54 (-90) -41.9% |
| Circum. inches (mm) | 82.66 (2099.53) | 78.19 (1986.11) | -4.47 (-113.41) -5.4% |
| Sidewall Height inches (mm) | 4.66 (118.25) | 3.44 (87.5) | -1.21 (-30.75) -26% |
| Revolutions per mile (km) | 766.53 (476.3) | 810.3 (503.49) | 43.77 (27.2) 5.7% |
125/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.92 mph (30.45 km/h) |
| 25 mph (40.23 km/h) | 23.65 mph (38.06 km/h) |
| 30 mph (48.28 km/h) | 28.38 mph (45.67 km/h) |
| 35 mph (56.33 km/h) | 33.11 mph (53.28 km/h) |
| 40 mph (64.37 km/h) | 37.84 mph (60.9 km/h) |
| 45 mph (72.42 km/h) | 42.57 mph (68.51 km/h) |
| 50 mph (80.47 km/h) | 47.3 mph (76.12 km/h) |
| 55 mph (88.51 km/h) | 52.03 mph (83.73 km/h) |
| 60 mph (96.56 km/h) | 56.76 mph (91.34 km/h) |
| 65 mph (104.61 km/h) | 61.49 mph (98.96 km/h) |
| 70 mph (112.65 km/h) | 66.22 mph (106.57 km/h) |
| 75 mph (120.7 km/h) | 70.95 mph (114.18 km/h) |
| 80 mph (128.75 km/h) | 75.68 mph (121.79 km/h) |
| 85 mph (136.79 km/h) | 80.41 mph (129.41 km/h) |
| 90 mph (144.84 km/h) | 85.14 mph (137.02 km/h) |
| 95 mph (152.89 km/h) | 89.87 mph (144.63 km/h) |
| 100 mph (160.93 km/h) | 94.6 mph (152.24 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 |
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