Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/85-14 | 245/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.38 (670.1) | 25.68 (652.3) | -0.7 (-17.8) -2.7% |
| Width inches (mm) | 7.28 (185) | 9.65 (245) | 2.36 (60) 32.4% |
| Circum. inches (mm) | 82.88 (2105.18) | 80.68 (2049.26) | -2.2 (-55.92) -2.7% |
| Sidewall Height inches (mm) | 6.19 (157.25) | 4.34 (110.25) | -1.85 (-47) -29.9% |
| Revolutions per mile (km) | 764.47 (475.02) | 785.33 (487.98) | 20.86 (12.96) 2.7% |
245/45-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.47 mph (31.33 km/h) |
| 25 mph (40.23 km/h) | 24.34 mph (39.16 km/h) |
| 30 mph (48.28 km/h) | 29.2 mph (47 km/h) |
| 35 mph (56.33 km/h) | 34.07 mph (54.83 km/h) |
| 40 mph (64.37 km/h) | 38.94 mph (62.66 km/h) |
| 45 mph (72.42 km/h) | 43.8 mph (70.5 km/h) |
| 50 mph (80.47 km/h) | 48.67 mph (78.33 km/h) |
| 55 mph (88.51 km/h) | 53.54 mph (86.16 km/h) |
| 60 mph (96.56 km/h) | 58.41 mph (94 km/h) |
| 65 mph (104.61 km/h) | 63.27 mph (101.83 km/h) |
| 70 mph (112.65 km/h) | 68.14 mph (109.66 km/h) |
| 75 mph (120.7 km/h) | 73.01 mph (117.49 km/h) |
| 80 mph (128.75 km/h) | 77.87 mph (125.33 km/h) |
| 85 mph (136.79 km/h) | 82.74 mph (133.16 km/h) |
| 90 mph (144.84 km/h) | 87.61 mph (140.99 km/h) |
| 95 mph (152.89 km/h) | 92.48 mph (148.83 km/h) |
| 100 mph (160.93 km/h) | 97.34 mph (156.66 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 |
Better Fuel Economy Factory Ratios Increased Power
