Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/60-20 | 305/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.99 (838) | 32.01 (813) | -0.98 (-25) -3% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 103.65 (2632.65) | 100.56 (2554.11) | -3.09 (-78.54) -3% |
| Sidewall Height inches (mm) | 6.5 (165) | 6 (152.5) | -0.49 (-12.5) -7.6% |
| Revolutions per mile (km) | 611.3 (379.84) | 630.1 (391.52) | 18.8 (11.68) 3.1% |
305/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.4 mph (31.23 km/h) |
| 25 mph (40.23 km/h) | 24.25 mph (39.03 km/h) |
| 30 mph (48.28 km/h) | 29.11 mph (46.84 km/h) |
| 35 mph (56.33 km/h) | 33.96 mph (54.65 km/h) |
| 40 mph (64.37 km/h) | 38.81 mph (62.45 km/h) |
| 45 mph (72.42 km/h) | 43.66 mph (70.26 km/h) |
| 50 mph (80.47 km/h) | 48.51 mph (78.07 km/h) |
| 55 mph (88.51 km/h) | 53.36 mph (85.87 km/h) |
| 60 mph (96.56 km/h) | 58.21 mph (93.68 km/h) |
| 65 mph (104.61 km/h) | 63.06 mph (101.49 km/h) |
| 70 mph (112.65 km/h) | 67.91 mph (109.29 km/h) |
| 75 mph (120.7 km/h) | 72.76 mph (117.1 km/h) |
| 80 mph (128.75 km/h) | 77.61 mph (124.91 km/h) |
| 85 mph (136.79 km/h) | 82.46 mph (132.71 km/h) |
| 90 mph (144.84 km/h) | 87.32 mph (140.52 km/h) |
| 95 mph (152.89 km/h) | 92.17 mph (148.33 km/h) |
| 100 mph (160.93 km/h) | 97.02 mph (156.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1603 | 1863 | 2006 | 2095 | 2190 | 2259 | 2334 | 2422 | 2545 | 2668 | 2804 | 2914 | 3111 | 3330 | 3500 | 3610 | 3671 | 3896 | 4210 | 4892 |
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