Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-20 | 265/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.73 (679) | 26.26 (667) | -0.47 (-12) -1.8% |
| Width inches (mm) | 11.22 (285) | 10.43 (265) | -0.79 (-20) -7% |
| Circum. inches (mm) | 83.98 (2133.14) | 82.5 (2095.44) | -1.48 (-37.7) -1.8% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 3.13 (79.5) | -0.24 (-6) -7% |
| Revolutions per mile (km) | 754.45 (468.79) | 768.02 (477.23) | 13.57 (8.43) 1.8% |
265/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.62 km/h) |
| 25 mph (40.23 km/h) | 24.56 mph (39.52 km/h) |
| 30 mph (48.28 km/h) | 29.47 mph (47.43 km/h) |
| 35 mph (56.33 km/h) | 34.38 mph (55.33 km/h) |
| 40 mph (64.37 km/h) | 39.29 mph (63.24 km/h) |
| 45 mph (72.42 km/h) | 44.2 mph (71.14 km/h) |
| 50 mph (80.47 km/h) | 49.12 mph (79.05 km/h) |
| 55 mph (88.51 km/h) | 54.03 mph (86.95 km/h) |
| 60 mph (96.56 km/h) | 58.94 mph (94.85 km/h) |
| 65 mph (104.61 km/h) | 63.85 mph (102.76 km/h) |
| 70 mph (112.65 km/h) | 68.76 mph (110.66 km/h) |
| 75 mph (120.7 km/h) | 73.67 mph (118.57 km/h) |
| 80 mph (128.75 km/h) | 78.59 mph (126.47 km/h) |
| 85 mph (136.79 km/h) | 83.5 mph (134.38 km/h) |
| 90 mph (144.84 km/h) | 88.41 mph (142.28 km/h) |
| 95 mph (152.89 km/h) | 93.32 mph (150.19 km/h) |
| 100 mph (160.93 km/h) | 98.23 mph (158.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1954 | 2271 | 2445 | 2553 | 2670 | 2753 | 2844 | 2952 | 3102 | 3252 | 3418 | 3551 | 3792 | 4059 | 4267 | 4400 | 4474 | 4749 | 5132 | 5963 |
Better Fuel Economy Factory Ratios Increased Power
