Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/60-20 | 255/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.05 (814) | 31.04 (788.5) | -1 (-25.5) -3.1% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 100.68 (2557.26) | 97.53 (2477.15) | -3.15 (-80.11) -3.1% |
| Sidewall Height inches (mm) | 6.02 (153) | 5.52 (140.25) | -0.5 (-12.75) -8.3% |
| Revolutions per mile (km) | 629.32 (391.04) | 649.68 (403.69) | 20.35 (12.65) 3.2% |
255/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.37 mph (31.18 km/h) |
| 25 mph (40.23 km/h) | 24.22 mph (38.97 km/h) |
| 30 mph (48.28 km/h) | 29.06 mph (46.77 km/h) |
| 35 mph (56.33 km/h) | 33.9 mph (54.56 km/h) |
| 40 mph (64.37 km/h) | 38.75 mph (62.36 km/h) |
| 45 mph (72.42 km/h) | 43.59 mph (70.15 km/h) |
| 50 mph (80.47 km/h) | 48.43 mph (77.95 km/h) |
| 55 mph (88.51 km/h) | 53.28 mph (85.74 km/h) |
| 60 mph (96.56 km/h) | 58.12 mph (93.54 km/h) |
| 65 mph (104.61 km/h) | 62.96 mph (101.33 km/h) |
| 70 mph (112.65 km/h) | 67.81 mph (109.13 km/h) |
| 75 mph (120.7 km/h) | 72.65 mph (116.92 km/h) |
| 80 mph (128.75 km/h) | 77.49 mph (124.71 km/h) |
| 85 mph (136.79 km/h) | 82.34 mph (132.51 km/h) |
| 90 mph (144.84 km/h) | 87.18 mph (140.3 km/h) |
| 95 mph (152.89 km/h) | 92.02 mph (148.1 km/h) |
| 100 mph (160.93 km/h) | 96.87 mph (155.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1653 | 1921 | 2068 | 2160 | 2258 | 2329 | 2406 | 2498 | 2624 | 2751 | 2892 | 3004 | 3208 | 3433 | 3609 | 3722 | 3785 | 4017 | 4341 | 5044 |
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