Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 275/66-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 34.29 (871) | 1.69 (42.8) 5.2% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 102.44 (2601.87) | 107.73 (2736.33) | 5.29 (134.46) 5.2% |
| Sidewall Height inches (mm) | 4.8 (122) | 7.15 (181.5) | 2.34 (59.5) 48.8% |
| Revolutions per mile (km) | 618.53 (384.34) | 588.14 (365.45) | -30.39 (-18.89) -4.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.85 km/h) |
| 25 mph (40.23 km/h) | 26.29 mph (42.31 km/h) |
| 30 mph (48.28 km/h) | 31.55 mph (50.78 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.24 km/h) |
| 40 mph (64.37 km/h) | 42.07 mph (67.7 km/h) |
| 45 mph (72.42 km/h) | 47.33 mph (76.16 km/h) |
| 50 mph (80.47 km/h) | 52.58 mph (84.63 km/h) |
| 55 mph (88.51 km/h) | 57.84 mph (93.09 km/h) |
| 60 mph (96.56 km/h) | 63.1 mph (101.55 km/h) |
| 65 mph (104.61 km/h) | 68.36 mph (110.01 km/h) |
| 70 mph (112.65 km/h) | 73.62 mph (118.48 km/h) |
| 75 mph (120.7 km/h) | 78.88 mph (126.94 km/h) |
| 80 mph (128.75 km/h) | 84.13 mph (135.4 km/h) |
| 85 mph (136.79 km/h) | 89.39 mph (143.86 km/h) |
| 90 mph (144.84 km/h) | 94.65 mph (152.33 km/h) |
| 95 mph (152.89 km/h) | 99.91 mph (160.79 km/h) |
| 100 mph (160.93 km/h) | 105.17 mph (169.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1497 | 1739 | 1872 | 1955 | 2044 | 2108 | 2178 | 2261 | 2376 | 2490 | 2618 | 2720 | 2904 | 3108 | 3267 | 3369 | 3426 | 3637 | 3930 | 4567 |
Better Fuel Economy Factory Ratios Increased Power
