Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-23 | 255/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.41 (797.7) | 30.04 (763) | -1.37 (-34.7) -4.4% |
| Width inches (mm) | 12.01 (305) | 10.04 (255) | -1.97 (-50) -16.4% |
| Circum. inches (mm) | 98.66 (2506.05) | 94.37 (2397.04) | -4.29 (-109.01) -4.4% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 5.02 (127.5) | 0.82 (20.75) 19.4% |
| Revolutions per mile (km) | 642.18 (399.03) | 671.39 (417.18) | 29.21 (18.15) 4.5% |
255/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.13 mph (30.79 km/h) |
| 25 mph (40.23 km/h) | 23.91 mph (38.48 km/h) |
| 30 mph (48.28 km/h) | 28.69 mph (46.18 km/h) |
| 35 mph (56.33 km/h) | 33.48 mph (53.88 km/h) |
| 40 mph (64.37 km/h) | 38.26 mph (61.57 km/h) |
| 45 mph (72.42 km/h) | 43.04 mph (69.27 km/h) |
| 50 mph (80.47 km/h) | 47.82 mph (76.97 km/h) |
| 55 mph (88.51 km/h) | 52.61 mph (84.66 km/h) |
| 60 mph (96.56 km/h) | 57.39 mph (92.36 km/h) |
| 65 mph (104.61 km/h) | 62.17 mph (100.06 km/h) |
| 70 mph (112.65 km/h) | 66.95 mph (107.75 km/h) |
| 75 mph (120.7 km/h) | 71.74 mph (115.45 km/h) |
| 80 mph (128.75 km/h) | 76.52 mph (123.15 km/h) |
| 85 mph (136.79 km/h) | 81.3 mph (130.84 km/h) |
| 90 mph (144.84 km/h) | 86.08 mph (138.54 km/h) |
| 95 mph (152.89 km/h) | 90.87 mph (146.24 km/h) |
| 100 mph (160.93 km/h) | 95.65 mph (153.93 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1709 | 1985 | 2138 | 2232 | 2334 | 2407 | 2486 | 2581 | 2712 | 2843 | 2988 | 3104 | 3315 | 3548 | 3730 | 3846 | 3912 | 4151 | 4486 | 5213 |
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