Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-20 | 255/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.07 (865.5) | 31.04 (788.5) | -3.03 (-77) -8.9% |
| Width inches (mm) | 10.83 (275) | 10.04 (255) | -0.79 (-20) -7.3% |
| Circum. inches (mm) | 107.05 (2719.05) | 97.53 (2477.15) | -9.52 (-241.9) -8.9% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 5.52 (140.25) | -1.52 (-38.5) -21.5% |
| Revolutions per mile (km) | 591.88 (367.78) | 649.68 (403.69) | 57.8 (35.91) 9.8% |
255/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.22 mph (29.32 km/h) |
| 25 mph (40.23 km/h) | 22.78 mph (36.65 km/h) |
| 30 mph (48.28 km/h) | 27.33 mph (43.99 km/h) |
| 35 mph (56.33 km/h) | 31.89 mph (51.32 km/h) |
| 40 mph (64.37 km/h) | 36.44 mph (58.65 km/h) |
| 45 mph (72.42 km/h) | 41 mph (65.98 km/h) |
| 50 mph (80.47 km/h) | 45.55 mph (73.31 km/h) |
| 55 mph (88.51 km/h) | 50.11 mph (80.64 km/h) |
| 60 mph (96.56 km/h) | 54.66 mph (87.97 km/h) |
| 65 mph (104.61 km/h) | 59.22 mph (95.3 km/h) |
| 70 mph (112.65 km/h) | 63.77 mph (102.63 km/h) |
| 75 mph (120.7 km/h) | 68.33 mph (109.96 km/h) |
| 80 mph (128.75 km/h) | 72.88 mph (117.29 km/h) |
| 85 mph (136.79 km/h) | 77.44 mph (124.62 km/h) |
| 90 mph (144.84 km/h) | 81.99 mph (131.96 km/h) |
| 95 mph (152.89 km/h) | 86.55 mph (139.29 km/h) |
| 100 mph (160.93 km/h) | 91.1 mph (146.62 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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