Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 245/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 27.65 (702.2) | -0.34 (-8.7) -1.2% |
| Width inches (mm) | 13.98 (355) | 9.65 (245) | -4.33 (-110) -31% |
| Circum. inches (mm) | 87.93 (2233.36) | 86.85 (2206.03) | -1.08 (-27.33) -1.2% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 4.82 (122.5) | 1.33 (33.75) 38% |
| Revolutions per mile (km) | 720.59 (447.76) | 729.52 (453.3) | 8.93 (5.55) 1.2% |
245/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.76 mph (31.79 km/h) |
| 25 mph (40.23 km/h) | 24.69 mph (39.74 km/h) |
| 30 mph (48.28 km/h) | 29.63 mph (47.69 km/h) |
| 35 mph (56.33 km/h) | 34.57 mph (55.64 km/h) |
| 40 mph (64.37 km/h) | 39.51 mph (63.59 km/h) |
| 45 mph (72.42 km/h) | 44.45 mph (71.53 km/h) |
| 50 mph (80.47 km/h) | 49.39 mph (79.48 km/h) |
| 55 mph (88.51 km/h) | 54.33 mph (87.43 km/h) |
| 60 mph (96.56 km/h) | 59.27 mph (95.38 km/h) |
| 65 mph (104.61 km/h) | 64.2 mph (103.33 km/h) |
| 70 mph (112.65 km/h) | 69.14 mph (111.28 km/h) |
| 75 mph (120.7 km/h) | 74.08 mph (119.22 km/h) |
| 80 mph (128.75 km/h) | 79.02 mph (127.17 km/h) |
| 85 mph (136.79 km/h) | 83.96 mph (135.12 km/h) |
| 90 mph (144.84 km/h) | 88.9 mph (143.07 km/h) |
| 95 mph (152.89 km/h) | 93.84 mph (151.02 km/h) |
| 100 mph (160.93 km/h) | 98.78 mph (158.97 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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