Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 280/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 36.54 (928) | 3.93 (99.8) 12.1% |
| Width inches (mm) | 12.01 (305) | 11.02 (280) | -0.98 (-25) -8.2% |
| Circum. inches (mm) | 102.44 (2601.87) | 114.78 (2915.4) | 12.34 (313.53) 12.1% |
| Sidewall Height inches (mm) | 4.8 (122) | 8.27 (210) | 3.46 (88) 72.1% |
| Revolutions per mile (km) | 618.53 (384.34) | 552.02 (343.01) | -66.52 (-41.33) -10.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.41 mph (36.07 km/h) |
| 25 mph (40.23 km/h) | 28.01 mph (45.08 km/h) |
| 30 mph (48.28 km/h) | 33.62 mph (54.1 km/h) |
| 35 mph (56.33 km/h) | 39.22 mph (63.11 km/h) |
| 40 mph (64.37 km/h) | 44.82 mph (72.13 km/h) |
| 45 mph (72.42 km/h) | 50.42 mph (81.15 km/h) |
| 50 mph (80.47 km/h) | 56.03 mph (90.16 km/h) |
| 55 mph (88.51 km/h) | 61.63 mph (99.18 km/h) |
| 60 mph (96.56 km/h) | 67.23 mph (108.2 km/h) |
| 65 mph (104.61 km/h) | 72.83 mph (117.21 km/h) |
| 70 mph (112.65 km/h) | 78.44 mph (126.23 km/h) |
| 75 mph (120.7 km/h) | 84.04 mph (135.25 km/h) |
| 80 mph (128.75 km/h) | 89.64 mph (144.26 km/h) |
| 85 mph (136.79 km/h) | 95.24 mph (153.28 km/h) |
| 90 mph (144.84 km/h) | 100.85 mph (162.29 km/h) |
| 95 mph (152.89 km/h) | 106.45 mph (171.31 km/h) |
| 100 mph (160.93 km/h) | 112.05 mph (180.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1405 | 1632 | 1757 | 1835 | 1919 | 1979 | 2044 | 2122 | 2230 | 2337 | 2457 | 2553 | 2726 | 2917 | 3067 | 3162 | 3216 | 3413 | 3688 | 4286 |
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