Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-18 | 245/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.97 (659.7) | 27.65 (702.2) | 1.67 (42.5) 6.4% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 81.59 (2072.51) | 86.85 (2206.03) | 5.26 (133.52) 6.4% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.82 (122.5) | 0.84 (21.25) 21% |
| Revolutions per mile (km) | 776.52 (482.51) | 729.52 (453.3) | -47 (-29.2) -6.1% |
245/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.29 mph (34.26 km/h) |
| 25 mph (40.23 km/h) | 26.61 mph (42.83 km/h) |
| 30 mph (48.28 km/h) | 31.93 mph (51.39 km/h) |
| 35 mph (56.33 km/h) | 37.25 mph (59.96 km/h) |
| 40 mph (64.37 km/h) | 42.58 mph (68.52 km/h) |
| 45 mph (72.42 km/h) | 47.9 mph (77.09 km/h) |
| 50 mph (80.47 km/h) | 53.22 mph (85.65 km/h) |
| 55 mph (88.51 km/h) | 58.54 mph (94.22 km/h) |
| 60 mph (96.56 km/h) | 63.87 mph (102.78 km/h) |
| 65 mph (104.61 km/h) | 69.19 mph (111.35 km/h) |
| 70 mph (112.65 km/h) | 74.51 mph (119.91 km/h) |
| 75 mph (120.7 km/h) | 79.83 mph (128.48 km/h) |
| 80 mph (128.75 km/h) | 85.15 mph (137.04 km/h) |
| 85 mph (136.79 km/h) | 90.48 mph (145.61 km/h) |
| 90 mph (144.84 km/h) | 95.8 mph (154.17 km/h) |
| 95 mph (152.89 km/h) | 101.12 mph (162.74 km/h) |
| 100 mph (160.93 km/h) | 106.44 mph (171.3 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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