Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 306/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 32.46 (824.4) | -0.15 (-3.8) -0.5% |
| Width inches (mm) | 12.01 (305) | 12.05 (306) | 0.04 (1) 0.3% |
| Circum. inches (mm) | 102.44 (2601.87) | 101.97 (2589.93) | -0.47 (-11.94) -0.5% |
| Sidewall Height inches (mm) | 4.8 (122) | 7.23 (183.6) | 2.43 (61.6) 50.5% |
| Revolutions per mile (km) | 618.53 (384.34) | 621.39 (386.11) | 2.85 (1.77) 0.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.91 mph (32.04 km/h) |
| 25 mph (40.23 km/h) | 24.89 mph (40.05 km/h) |
| 30 mph (48.28 km/h) | 29.86 mph (48.06 km/h) |
| 35 mph (56.33 km/h) | 34.84 mph (56.07 km/h) |
| 40 mph (64.37 km/h) | 39.82 mph (64.08 km/h) |
| 45 mph (72.42 km/h) | 44.79 mph (72.09 km/h) |
| 50 mph (80.47 km/h) | 49.77 mph (80.1 km/h) |
| 55 mph (88.51 km/h) | 54.75 mph (88.11 km/h) |
| 60 mph (96.56 km/h) | 59.72 mph (96.12 km/h) |
| 65 mph (104.61 km/h) | 64.7 mph (104.13 km/h) |
| 70 mph (112.65 km/h) | 69.68 mph (112.14 km/h) |
| 75 mph (120.7 km/h) | 74.66 mph (120.15 km/h) |
| 80 mph (128.75 km/h) | 79.63 mph (128.16 km/h) |
| 85 mph (136.79 km/h) | 84.61 mph (136.17 km/h) |
| 90 mph (144.84 km/h) | 89.59 mph (144.18 km/h) |
| 95 mph (152.89 km/h) | 94.56 mph (152.19 km/h) |
| 100 mph (160.93 km/h) | 99.54 mph (160.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1581 | 1837 | 1978 | 2066 | 2160 | 2227 | 2301 | 2389 | 2510 | 2631 | 2766 | 2873 | 3068 | 3284 | 3452 | 3560 | 3620 | 3842 | 4152 | 4825 |
Better Fuel Economy Factory Ratios Increased Power
