Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 365/80-20 | 325/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 42.99 (1092) | 35.35 (898) | -7.64 (-194) -17.8% |
| Width inches (mm) | 14.37 (365) | 12.8 (325) | -1.57 (-40) -11% |
| Circum. inches (mm) | 135.06 (3430.62) | 111.07 (2821.15) | -23.99 (-609.47) -17.8% |
| Sidewall Height inches (mm) | 11.5 (292) | 7.68 (195) | -3.82 (-97) -33.2% |
| Revolutions per mile (km) | 469.11 (291.49) | 570.46 (354.46) | 101.34 (62.97) 21.6% |
325/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.45 mph (26.47 km/h) |
| 25 mph (40.23 km/h) | 20.56 mph (33.09 km/h) |
| 30 mph (48.28 km/h) | 24.67 mph (39.7 km/h) |
| 35 mph (56.33 km/h) | 28.78 mph (46.32 km/h) |
| 40 mph (64.37 km/h) | 32.89 mph (52.94 km/h) |
| 45 mph (72.42 km/h) | 37.01 mph (59.55 km/h) |
| 50 mph (80.47 km/h) | 41.12 mph (66.17 km/h) |
| 55 mph (88.51 km/h) | 45.23 mph (72.79 km/h) |
| 60 mph (96.56 km/h) | 49.34 mph (79.41 km/h) |
| 65 mph (104.61 km/h) | 53.45 mph (86.02 km/h) |
| 70 mph (112.65 km/h) | 57.56 mph (92.64 km/h) |
| 75 mph (120.7 km/h) | 61.68 mph (99.26 km/h) |
| 80 mph (128.75 km/h) | 65.79 mph (105.87 km/h) |
| 85 mph (136.79 km/h) | 69.9 mph (112.49 km/h) |
| 90 mph (144.84 km/h) | 74.01 mph (119.11 km/h) |
| 95 mph (152.89 km/h) | 78.12 mph (125.73 km/h) |
| 100 mph (160.93 km/h) | 82.23 mph (132.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1452 | 1686 | 1816 | 1896 | 1983 | 2045 | 2113 | 2193 | 2304 | 2415 | 2539 | 2638 | 2817 | 3015 | 3169 | 3268 | 3323 | 3527 | 3811 | 4429 |
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