Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/55-16 | 255/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.88 (631.9) | 29.04 (737.5) | 4.16 (105.6) 16.7% |
| Width inches (mm) | 8.07 (205) | 10.04 (255) | 1.97 (50) 24.4% |
| Circum. inches (mm) | 78.16 (1985.17) | 91.22 (2316.92) | 13.06 (331.75) 16.7% |
| Sidewall Height inches (mm) | 4.44 (112.75) | 4.52 (114.75) | 0.08 (2) 1.8% |
| Revolutions per mile (km) | 810.68 (503.73) | 694.6 (431.61) | -116.08 (-72.13) -14.3% |
255/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.34 mph (37.57 km/h) |
| 25 mph (40.23 km/h) | 29.18 mph (46.96 km/h) |
| 30 mph (48.28 km/h) | 35.01 mph (56.35 km/h) |
| 35 mph (56.33 km/h) | 40.85 mph (65.74 km/h) |
| 40 mph (64.37 km/h) | 46.68 mph (75.13 km/h) |
| 45 mph (72.42 km/h) | 52.52 mph (84.52 km/h) |
| 50 mph (80.47 km/h) | 58.36 mph (93.91 km/h) |
| 55 mph (88.51 km/h) | 64.19 mph (103.31 km/h) |
| 60 mph (96.56 km/h) | 70.03 mph (112.7 km/h) |
| 65 mph (104.61 km/h) | 75.86 mph (122.09 km/h) |
| 70 mph (112.65 km/h) | 81.7 mph (131.48 km/h) |
| 75 mph (120.7 km/h) | 87.53 mph (140.87 km/h) |
| 80 mph (128.75 km/h) | 93.37 mph (150.26 km/h) |
| 85 mph (136.79 km/h) | 99.2 mph (159.65 km/h) |
| 90 mph (144.84 km/h) | 105.04 mph (169.05 km/h) |
| 95 mph (152.89 km/h) | 110.88 mph (178.44 km/h) |
| 100 mph (160.93 km/h) | 116.71 mph (187.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1768 | 2053 | 2211 | 2309 | 2415 | 2490 | 2572 | 2670 | 2806 | 2941 | 3091 | 3212 | 3430 | 3671 | 3859 | 3979 | 4047 | 4295 | 4641 | 5393 |
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