Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/55-20 | 225/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.21 (843.5) | 26.74 (679.3) | -6.46 (-164.2) -19.5% |
| Width inches (mm) | 12.01 (305) | 8.86 (225) | -3.15 (-80) -26.2% |
| Circum. inches (mm) | 104.33 (2649.93) | 84.02 (2134.08) | -20.31 (-515.85) -19.5% |
| Sidewall Height inches (mm) | 6.6 (167.75) | 4.87 (123.75) | -1.73 (-44) -26.2% |
| Revolutions per mile (km) | 607.31 (377.37) | 754.11 (468.58) | 146.8 (91.22) 24.2% |
225/55-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.11 mph (25.92 km/h) |
| 25 mph (40.23 km/h) | 20.13 mph (32.4 km/h) |
| 30 mph (48.28 km/h) | 24.16 mph (38.88 km/h) |
| 35 mph (56.33 km/h) | 28.19 mph (45.36 km/h) |
| 40 mph (64.37 km/h) | 32.21 mph (51.84 km/h) |
| 45 mph (72.42 km/h) | 36.24 mph (58.32 km/h) |
| 50 mph (80.47 km/h) | 40.27 mph (64.8 km/h) |
| 55 mph (88.51 km/h) | 44.29 mph (71.28 km/h) |
| 60 mph (96.56 km/h) | 48.32 mph (77.76 km/h) |
| 65 mph (104.61 km/h) | 52.35 mph (84.24 km/h) |
| 70 mph (112.65 km/h) | 56.37 mph (90.72 km/h) |
| 75 mph (120.7 km/h) | 60.4 mph (97.2 km/h) |
| 80 mph (128.75 km/h) | 64.43 mph (103.69 km/h) |
| 85 mph (136.79 km/h) | 68.45 mph (110.17 km/h) |
| 90 mph (144.84 km/h) | 72.48 mph (116.65 km/h) |
| 95 mph (152.89 km/h) | 76.51 mph (123.13 km/h) |
| 100 mph (160.93 km/h) | 80.53 mph (129.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1919 | 2229 | 2401 | 2507 | 2621 | 2703 | 2793 | 2899 | 3046 | 3193 | 3356 | 3487 | 3724 | 3985 | 4189 | 4320 | 4393 | 4663 | 5039 | 5855 |
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