Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 235/45-23 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 31.33 (795.7) | -1.28 (-32.5) -3.9% |
| Width inches (mm) | 12.01 (305) | 9.25 (235) | -2.76 (-70) -23% |
| Circum. inches (mm) | 102.44 (2601.87) | 98.42 (2499.77) | -4.02 (-102.1) -3.9% |
| Sidewall Height inches (mm) | 4.8 (122) | 4.16 (105.75) | -0.64 (-16.25) -13.3% |
| Revolutions per mile (km) | 618.53 (384.34) | 643.8 (400.04) | 25.26 (15.7) 4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.22 mph (30.92 km/h) |
| 25 mph (40.23 km/h) | 24.02 mph (38.65 km/h) |
| 30 mph (48.28 km/h) | 28.82 mph (46.39 km/h) |
| 35 mph (56.33 km/h) | 33.63 mph (54.12 km/h) |
| 40 mph (64.37 km/h) | 38.43 mph (61.85 km/h) |
| 45 mph (72.42 km/h) | 43.23 mph (69.58 km/h) |
| 50 mph (80.47 km/h) | 48.04 mph (77.31 km/h) |
| 55 mph (88.51 km/h) | 52.84 mph (85.04 km/h) |
| 60 mph (96.56 km/h) | 57.65 mph (92.77 km/h) |
| 65 mph (104.61 km/h) | 62.45 mph (100.5 km/h) |
| 70 mph (112.65 km/h) | 67.25 mph (108.23 km/h) |
| 75 mph (120.7 km/h) | 72.06 mph (115.96 km/h) |
| 80 mph (128.75 km/h) | 76.86 mph (123.7 km/h) |
| 85 mph (136.79 km/h) | 81.66 mph (131.43 km/h) |
| 90 mph (144.84 km/h) | 86.47 mph (139.16 km/h) |
| 95 mph (152.89 km/h) | 91.27 mph (146.89 km/h) |
| 100 mph (160.93 km/h) | 96.08 mph (154.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1638 | 1903 | 2050 | 2140 | 2238 | 2308 | 2384 | 2475 | 2600 | 2726 | 2865 | 2977 | 3179 | 3402 | 3576 | 3688 | 3751 | 3981 | 4302 | 4999 |
Better Fuel Economy Factory Ratios Increased Power
