Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 285/45-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 33.1 (840.7) | 0.49 (12.5) 1.5% |
| Width inches (mm) | 12.01 (305) | 11.22 (285) | -0.79 (-20) -6.6% |
| Circum. inches (mm) | 102.44 (2601.87) | 103.98 (2641.14) | 1.55 (39.27) 1.5% |
| Sidewall Height inches (mm) | 4.8 (122) | 5.05 (128.25) | 0.25 (6.25) 5.1% |
| Revolutions per mile (km) | 618.53 (384.34) | 609.34 (378.62) | -9.2 (-5.71) -1.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.3 mph (32.67 km/h) |
| 25 mph (40.23 km/h) | 25.38 mph (40.84 km/h) |
| 30 mph (48.28 km/h) | 30.45 mph (49.01 km/h) |
| 35 mph (56.33 km/h) | 35.53 mph (57.18 km/h) |
| 40 mph (64.37 km/h) | 40.6 mph (65.35 km/h) |
| 45 mph (72.42 km/h) | 45.68 mph (73.51 km/h) |
| 50 mph (80.47 km/h) | 50.75 mph (81.68 km/h) |
| 55 mph (88.51 km/h) | 55.83 mph (89.85 km/h) |
| 60 mph (96.56 km/h) | 60.91 mph (98.02 km/h) |
| 65 mph (104.61 km/h) | 65.98 mph (106.19 km/h) |
| 70 mph (112.65 km/h) | 71.06 mph (114.35 km/h) |
| 75 mph (120.7 km/h) | 76.13 mph (122.52 km/h) |
| 80 mph (128.75 km/h) | 81.21 mph (130.69 km/h) |
| 85 mph (136.79 km/h) | 86.28 mph (138.86 km/h) |
| 90 mph (144.84 km/h) | 91.36 mph (147.03 km/h) |
| 95 mph (152.89 km/h) | 96.43 mph (155.2 km/h) |
| 100 mph (160.93 km/h) | 101.51 mph (163.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1551 | 1801 | 1940 | 2026 | 2118 | 2184 | 2257 | 2342 | 2461 | 2580 | 2712 | 2818 | 3009 | 3220 | 3385 | 3491 | 3550 | 3768 | 4071 | 4731 |
Better Fuel Economy Factory Ratios Increased Power
