Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-18 | 245/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.18 (715.7) | 27.65 (702.2) | -0.53 (-13.5) -1.9% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 88.52 (2248.44) | 86.85 (2206.03) | -1.67 (-42.41) -1.9% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 4.82 (122.5) | -0.27 (-6.75) -5.2% |
| Revolutions per mile (km) | 715.76 (444.75) | 729.52 (453.3) | 13.76 (8.55) 1.9% |
245/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.62 mph (31.58 km/h) |
| 25 mph (40.23 km/h) | 24.53 mph (39.47 km/h) |
| 30 mph (48.28 km/h) | 29.43 mph (47.37 km/h) |
| 35 mph (56.33 km/h) | 34.34 mph (55.26 km/h) |
| 40 mph (64.37 km/h) | 39.25 mph (63.16 km/h) |
| 45 mph (72.42 km/h) | 44.15 mph (71.05 km/h) |
| 50 mph (80.47 km/h) | 49.06 mph (78.95 km/h) |
| 55 mph (88.51 km/h) | 53.96 mph (86.84 km/h) |
| 60 mph (96.56 km/h) | 58.87 mph (94.74 km/h) |
| 65 mph (104.61 km/h) | 63.77 mph (102.63 km/h) |
| 70 mph (112.65 km/h) | 68.68 mph (110.53 km/h) |
| 75 mph (120.7 km/h) | 73.59 mph (118.42 km/h) |
| 80 mph (128.75 km/h) | 78.49 mph (126.32 km/h) |
| 85 mph (136.79 km/h) | 83.4 mph (134.21 km/h) |
| 90 mph (144.84 km/h) | 88.3 mph (142.11 km/h) |
| 95 mph (152.89 km/h) | 93.21 mph (150 km/h) |
| 100 mph (160.93 km/h) | 98.11 mph (157.9 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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