Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 38/15.5-20 | 325/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.99 (965.04) | 35.35 (898) | -2.64 (-67.04) -6.9% |
| Width inches (mm) | 15.51 (394) | 12.8 (325) | -2.72 (-69) -17.5% |
| Circum. inches (mm) | 119.36 (3031.76) | 111.07 (2821.15) | -8.29 (-210.61) -6.9% |
| Sidewall Height inches (mm) | 9 (228.52) | 7.68 (195) | -1.32 (-33.52) -14.7% |
| Revolutions per mile (km) | 530.83 (329.84) | 570.46 (354.46) | 39.63 (24.62) 7.5% |
325/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.61 mph (29.95 km/h) |
| 25 mph (40.23 km/h) | 23.26 mph (37.44 km/h) |
| 30 mph (48.28 km/h) | 27.92 mph (44.93 km/h) |
| 35 mph (56.33 km/h) | 32.57 mph (52.41 km/h) |
| 40 mph (64.37 km/h) | 37.22 mph (59.9 km/h) |
| 45 mph (72.42 km/h) | 41.87 mph (67.39 km/h) |
| 50 mph (80.47 km/h) | 46.53 mph (74.88 km/h) |
| 55 mph (88.51 km/h) | 51.18 mph (82.37 km/h) |
| 60 mph (96.56 km/h) | 55.83 mph (89.85 km/h) |
| 65 mph (104.61 km/h) | 60.48 mph (97.34 km/h) |
| 70 mph (112.65 km/h) | 65.14 mph (104.83 km/h) |
| 75 mph (120.7 km/h) | 69.79 mph (112.32 km/h) |
| 80 mph (128.75 km/h) | 74.44 mph (119.8 km/h) |
| 85 mph (136.79 km/h) | 79.1 mph (127.29 km/h) |
| 90 mph (144.84 km/h) | 83.75 mph (134.78 km/h) |
| 95 mph (152.89 km/h) | 88.4 mph (142.27 km/h) |
| 100 mph (160.93 km/h) | 93.05 mph (149.75 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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