Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-19 | 235/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.68 (703.1) | 26.33 (668.7) | -1.35 (-34.4) -4.9% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 86.96 (2208.85) | 82.71 (2100.78) | -4.25 (-108.07) -4.9% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 4.16 (105.75) | -0.18 (-4.5) -4.1% |
| Revolutions per mile (km) | 728.59 (452.72) | 766.07 (476.01) | 37.48 (23.29) 5.1% |
235/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.02 mph (30.61 km/h) |
| 25 mph (40.23 km/h) | 23.78 mph (38.27 km/h) |
| 30 mph (48.28 km/h) | 28.53 mph (45.92 km/h) |
| 35 mph (56.33 km/h) | 33.29 mph (53.57 km/h) |
| 40 mph (64.37 km/h) | 38.04 mph (61.22 km/h) |
| 45 mph (72.42 km/h) | 42.8 mph (68.88 km/h) |
| 50 mph (80.47 km/h) | 47.55 mph (76.53 km/h) |
| 55 mph (88.51 km/h) | 52.31 mph (84.18 km/h) |
| 60 mph (96.56 km/h) | 57.06 mph (91.84 km/h) |
| 65 mph (104.61 km/h) | 61.82 mph (99.49 km/h) |
| 70 mph (112.65 km/h) | 66.58 mph (107.14 km/h) |
| 75 mph (120.7 km/h) | 71.33 mph (114.8 km/h) |
| 80 mph (128.75 km/h) | 76.09 mph (122.45 km/h) |
| 85 mph (136.79 km/h) | 80.84 mph (130.1 km/h) |
| 90 mph (144.84 km/h) | 85.6 mph (137.75 km/h) |
| 95 mph (152.89 km/h) | 90.35 mph (145.41 km/h) |
| 100 mph (160.93 km/h) | 95.11 mph (153.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1949 | 2265 | 2439 | 2547 | 2663 | 2746 | 2837 | 2945 | 3094 | 3244 | 3410 | 3542 | 3783 | 4048 | 4256 | 4388 | 4463 | 4737 | 5118 | 5948 |
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