Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-18 | 245/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.04 (686.7) | 27.65 (702.2) | 0.61 (15.5) 2.3% |
| Width inches (mm) | 10.04 (255) | 9.65 (245) | -0.39 (-10) -3.9% |
| Circum. inches (mm) | 84.93 (2157.33) | 86.85 (2206.03) | 1.92 (48.69) 2.3% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 4.82 (122.5) | 0.31 (7.75) 6.8% |
| Revolutions per mile (km) | 745.99 (463.53) | 729.52 (453.3) | -16.47 (-10.23) -2.2% |
245/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.91 km/h) |
| 25 mph (40.23 km/h) | 25.56 mph (41.14 km/h) |
| 30 mph (48.28 km/h) | 30.68 mph (49.37 km/h) |
| 35 mph (56.33 km/h) | 35.79 mph (57.6 km/h) |
| 40 mph (64.37 km/h) | 40.9 mph (65.83 km/h) |
| 45 mph (72.42 km/h) | 46.02 mph (74.06 km/h) |
| 50 mph (80.47 km/h) | 51.13 mph (82.28 km/h) |
| 55 mph (88.51 km/h) | 56.24 mph (90.51 km/h) |
| 60 mph (96.56 km/h) | 61.35 mph (98.74 km/h) |
| 65 mph (104.61 km/h) | 66.47 mph (106.97 km/h) |
| 70 mph (112.65 km/h) | 71.58 mph (115.2 km/h) |
| 75 mph (120.7 km/h) | 76.69 mph (123.43 km/h) |
| 80 mph (128.75 km/h) | 81.81 mph (131.65 km/h) |
| 85 mph (136.79 km/h) | 86.92 mph (139.88 km/h) |
| 90 mph (144.84 km/h) | 92.03 mph (148.11 km/h) |
| 95 mph (152.89 km/h) | 97.14 mph (156.34 km/h) |
| 100 mph (160.93 km/h) | 102.26 mph (164.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1856 | 2157 | 2323 | 2425 | 2536 | 2615 | 2702 | 2804 | 2947 | 3089 | 3247 | 3373 | 3602 | 3855 | 4053 | 4179 | 4250 | 4511 | 4874 | 5664 |
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