Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-20 | 34/10.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.32 (948) | 34.09 (865.78) | -3.24 (-82.22) -8.7% |
| Width inches (mm) | 10.83 (275) | 10.51 (267) | -0.31 (-8) -2.9% |
| Circum. inches (mm) | 117.25 (2978.23) | 107.08 (2719.93) | -10.17 (-258.3) -8.7% |
| Sidewall Height inches (mm) | 8.66 (220) | 7.04 (178.89) | -1.62 (-41.11) -18.7% |
| Revolutions per mile (km) | 540.37 (335.77) | 591.69 (367.66) | 51.32 (31.89) 9.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.27 mph (29.4 km/h) |
| 25 mph (40.23 km/h) | 22.83 mph (36.74 km/h) |
| 30 mph (48.28 km/h) | 27.4 mph (44.09 km/h) |
| 35 mph (56.33 km/h) | 31.96 mph (51.44 km/h) |
| 40 mph (64.37 km/h) | 36.53 mph (58.79 km/h) |
| 45 mph (72.42 km/h) | 41.1 mph (66.14 km/h) |
| 50 mph (80.47 km/h) | 45.66 mph (73.49 km/h) |
| 55 mph (88.51 km/h) | 50.23 mph (80.84 km/h) |
| 60 mph (96.56 km/h) | 54.8 mph (88.19 km/h) |
| 65 mph (104.61 km/h) | 59.36 mph (95.53 km/h) |
| 70 mph (112.65 km/h) | 63.93 mph (102.88 km/h) |
| 75 mph (120.7 km/h) | 68.5 mph (110.23 km/h) |
| 80 mph (128.75 km/h) | 73.06 mph (117.58 km/h) |
| 85 mph (136.79 km/h) | 77.63 mph (124.93 km/h) |
| 90 mph (144.84 km/h) | 82.19 mph (132.28 km/h) |
| 95 mph (152.89 km/h) | 86.76 mph (139.63 km/h) |
| 100 mph (160.93 km/h) | 91.33 mph (146.98 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1506 | 1749 | 1884 | 1967 | 2057 | 2121 | 2191 | 2275 | 2390 | 2505 | 2633 | 2736 | 2922 | 3127 | 3287 | 3389 | 3447 | 3659 | 3953 | 4594 |
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