Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-20 | 325/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.68 (703) | 26.4 (670.5) | -1.28 (-32.5) -4.6% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 86.95 (2208.54) | 82.93 (2106.44) | -4.02 (-102.1) -4.6% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 3.2 (81.25) | -0.64 (-16.25) -16.7% |
| Revolutions per mile (km) | 728.69 (452.79) | 764.01 (474.73) | 35.32 (21.95) 4.8% |
325/25-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.08 mph (30.7 km/h) |
| 25 mph (40.23 km/h) | 23.84 mph (38.37 km/h) |
| 30 mph (48.28 km/h) | 28.61 mph (46.05 km/h) |
| 35 mph (56.33 km/h) | 33.38 mph (53.72 km/h) |
| 40 mph (64.37 km/h) | 38.15 mph (61.4 km/h) |
| 45 mph (72.42 km/h) | 42.92 mph (69.07 km/h) |
| 50 mph (80.47 km/h) | 47.69 mph (76.75 km/h) |
| 55 mph (88.51 km/h) | 52.46 mph (84.42 km/h) |
| 60 mph (96.56 km/h) | 57.23 mph (92.1 km/h) |
| 65 mph (104.61 km/h) | 62 mph (99.77 km/h) |
| 70 mph (112.65 km/h) | 66.76 mph (107.45 km/h) |
| 75 mph (120.7 km/h) | 71.53 mph (115.12 km/h) |
| 80 mph (128.75 km/h) | 76.3 mph (122.8 km/h) |
| 85 mph (136.79 km/h) | 81.07 mph (130.47 km/h) |
| 90 mph (144.84 km/h) | 85.84 mph (138.15 km/h) |
| 95 mph (152.89 km/h) | 90.61 mph (145.82 km/h) |
| 100 mph (160.93 km/h) | 95.38 mph (153.49 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1944 | 2259 | 2432 | 2540 | 2656 | 2739 | 2830 | 2937 | 3086 | 3235 | 3400 | 3533 | 3773 | 4037 | 4244 | 4377 | 4451 | 4724 | 5105 | 5932 |
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