Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-23 | 285/40-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.2 (767.2) | 31.98 (812.2) | 1.77 (45) 5.9% |
| Width inches (mm) | 12.01 (305) | 11.22 (285) | -0.79 (-20) -6.6% |
| Circum. inches (mm) | 94.89 (2410.23) | 100.46 (2551.6) | 5.57 (141.37) 5.9% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 4.49 (114) | 0.89 (22.5) 24.6% |
| Revolutions per mile (km) | 667.71 (414.9) | 630.72 (391.91) | -36.99 (-22.99) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.17 mph (34.07 km/h) |
| 25 mph (40.23 km/h) | 26.47 mph (42.59 km/h) |
| 30 mph (48.28 km/h) | 31.76 mph (51.11 km/h) |
| 35 mph (56.33 km/h) | 37.05 mph (59.63 km/h) |
| 40 mph (64.37 km/h) | 42.35 mph (68.15 km/h) |
| 45 mph (72.42 km/h) | 47.64 mph (76.67 km/h) |
| 50 mph (80.47 km/h) | 52.93 mph (85.19 km/h) |
| 55 mph (88.51 km/h) | 58.23 mph (93.71 km/h) |
| 60 mph (96.56 km/h) | 63.52 mph (102.22 km/h) |
| 65 mph (104.61 km/h) | 68.81 mph (110.74 km/h) |
| 70 mph (112.65 km/h) | 74.11 mph (119.26 km/h) |
| 75 mph (120.7 km/h) | 79.4 mph (127.78 km/h) |
| 80 mph (128.75 km/h) | 84.69 mph (136.3 km/h) |
| 85 mph (136.79 km/h) | 89.99 mph (144.82 km/h) |
| 90 mph (144.84 km/h) | 95.28 mph (153.34 km/h) |
| 95 mph (152.89 km/h) | 100.57 mph (161.86 km/h) |
| 100 mph (160.93 km/h) | 105.87 mph (170.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1605 | 1865 | 2008 | 2097 | 2192 | 2261 | 2336 | 2425 | 2548 | 2671 | 2807 | 2916 | 3114 | 3333 | 3504 | 3613 | 3675 | 3900 | 4214 | 4897 |
Better Fuel Economy Factory Ratios Increased Power
