Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-17 | 275/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 26.5 (673) | 0.99 (25.2) 3.9% |
| Width inches (mm) | 5.31 (135) | 10.83 (275) | 5.51 (140) 103.7% |
| Circum. inches (mm) | 80.12 (2035.12) | 83.24 (2114.29) | 3.12 (79.17) 3.9% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.25 (82.5) | -1 (-25.5) -23.6% |
| Revolutions per mile (km) | 790.78 (491.37) | 761.17 (472.97) | -29.61 (-18.4) -3.7% |
275/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.78 mph (33.44 km/h) |
| 25 mph (40.23 km/h) | 25.97 mph (41.8 km/h) |
| 30 mph (48.28 km/h) | 31.17 mph (50.16 km/h) |
| 35 mph (56.33 km/h) | 36.36 mph (58.52 km/h) |
| 40 mph (64.37 km/h) | 41.56 mph (66.88 km/h) |
| 45 mph (72.42 km/h) | 46.75 mph (75.24 km/h) |
| 50 mph (80.47 km/h) | 51.95 mph (83.6 km/h) |
| 55 mph (88.51 km/h) | 57.14 mph (91.96 km/h) |
| 60 mph (96.56 km/h) | 62.33 mph (100.32 km/h) |
| 65 mph (104.61 km/h) | 67.53 mph (108.68 km/h) |
| 70 mph (112.65 km/h) | 72.72 mph (117.04 km/h) |
| 75 mph (120.7 km/h) | 77.92 mph (125.4 km/h) |
| 80 mph (128.75 km/h) | 83.11 mph (133.76 km/h) |
| 85 mph (136.79 km/h) | 88.31 mph (142.12 km/h) |
| 90 mph (144.84 km/h) | 93.5 mph (150.48 km/h) |
| 95 mph (152.89 km/h) | 98.7 mph (158.84 km/h) |
| 100 mph (160.93 km/h) | 103.89 mph (167.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1937 | 2250 | 2423 | 2531 | 2646 | 2728 | 2819 | 2926 | 3075 | 3223 | 3388 | 3520 | 3759 | 4022 | 4229 | 4360 | 4435 | 4707 | 5086 | 5910 |
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