Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 245/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 25.68 (652.3) | -0.72 (-18.2) -2.7% |
| Width inches (mm) | 12.8 (325) | 9.65 (245) | -3.15 (-80) -24.6% |
| Circum. inches (mm) | 82.93 (2106.44) | 80.68 (2049.26) | -2.25 (-57.18) -2.7% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 4.34 (110.25) | 1.14 (29) 35.7% |
| Revolutions per mile (km) | 764.01 (474.73) | 785.33 (487.98) | 21.32 (13.25) 2.8% |
245/45-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.46 mph (31.31 km/h) |
| 25 mph (40.23 km/h) | 24.32 mph (39.14 km/h) |
| 30 mph (48.28 km/h) | 29.19 mph (46.97 km/h) |
| 35 mph (56.33 km/h) | 34.05 mph (54.8 km/h) |
| 40 mph (64.37 km/h) | 38.91 mph (62.63 km/h) |
| 45 mph (72.42 km/h) | 43.78 mph (70.45 km/h) |
| 50 mph (80.47 km/h) | 48.64 mph (78.28 km/h) |
| 55 mph (88.51 km/h) | 53.51 mph (86.11 km/h) |
| 60 mph (96.56 km/h) | 58.37 mph (93.94 km/h) |
| 65 mph (104.61 km/h) | 63.24 mph (101.77 km/h) |
| 70 mph (112.65 km/h) | 68.1 mph (109.6 km/h) |
| 75 mph (120.7 km/h) | 72.96 mph (117.42 km/h) |
| 80 mph (128.75 km/h) | 77.83 mph (125.25 km/h) |
| 85 mph (136.79 km/h) | 82.69 mph (133.08 km/h) |
| 90 mph (144.84 km/h) | 87.56 mph (140.91 km/h) |
| 95 mph (152.89 km/h) | 92.42 mph (148.74 km/h) |
| 100 mph (160.93 km/h) | 97.29 mph (156.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2322 | 2500 | 2611 | 2730 | 2815 | 2908 | 3019 | 3172 | 3325 | 3495 | 3631 | 3878 | 4150 | 4363 | 4499 | 4575 | 4856 | 5247 | 6098 |
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