Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 280/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 34.33 (872) | 1.72 (43.8) 5.3% |
| Width inches (mm) | 12.01 (305) | 11.02 (280) | -0.98 (-25) -8.2% |
| Circum. inches (mm) | 102.44 (2601.87) | 107.85 (2739.47) | 5.42 (137.6) 5.3% |
| Sidewall Height inches (mm) | 4.8 (122) | 7.17 (182) | 2.36 (60) 49.2% |
| Revolutions per mile (km) | 618.53 (384.34) | 587.47 (365.03) | -31.07 (-19.31) -5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.06 mph (33.89 km/h) |
| 25 mph (40.23 km/h) | 26.32 mph (42.36 km/h) |
| 30 mph (48.28 km/h) | 31.59 mph (50.83 km/h) |
| 35 mph (56.33 km/h) | 36.85 mph (59.31 km/h) |
| 40 mph (64.37 km/h) | 42.12 mph (67.78 km/h) |
| 45 mph (72.42 km/h) | 47.38 mph (76.25 km/h) |
| 50 mph (80.47 km/h) | 52.64 mph (84.72 km/h) |
| 55 mph (88.51 km/h) | 57.91 mph (93.2 km/h) |
| 60 mph (96.56 km/h) | 63.17 mph (101.67 km/h) |
| 65 mph (104.61 km/h) | 68.44 mph (110.14 km/h) |
| 70 mph (112.65 km/h) | 73.7 mph (118.61 km/h) |
| 75 mph (120.7 km/h) | 78.97 mph (127.08 km/h) |
| 80 mph (128.75 km/h) | 84.23 mph (135.56 km/h) |
| 85 mph (136.79 km/h) | 89.5 mph (144.03 km/h) |
| 90 mph (144.84 km/h) | 94.76 mph (152.5 km/h) |
| 95 mph (152.89 km/h) | 100.02 mph (160.97 km/h) |
| 100 mph (160.93 km/h) | 105.29 mph (169.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1495 | 1737 | 1870 | 1953 | 2042 | 2106 | 2176 | 2258 | 2373 | 2487 | 2615 | 2716 | 2901 | 3104 | 3264 | 3365 | 3423 | 3633 | 3925 | 4561 |
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