Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-20 | 235/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.25 (743) | 28.33 (719.5) | -0.93 (-23.5) -3.2% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 91.9 (2334.2) | 88.99 (2260.38) | -2.91 (-73.83) -3.2% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 4.16 (105.75) | -0.46 (-11.75) -10% |
| Revolutions per mile (km) | 689.46 (428.41) | 711.98 (442.4) | 22.52 (13.99) 3.3% |
235/45-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.37 mph (31.17 km/h) |
| 25 mph (40.23 km/h) | 24.21 mph (38.96 km/h) |
| 30 mph (48.28 km/h) | 29.05 mph (46.75 km/h) |
| 35 mph (56.33 km/h) | 33.89 mph (54.55 km/h) |
| 40 mph (64.37 km/h) | 38.73 mph (62.34 km/h) |
| 45 mph (72.42 km/h) | 43.58 mph (70.13 km/h) |
| 50 mph (80.47 km/h) | 48.42 mph (77.92 km/h) |
| 55 mph (88.51 km/h) | 53.26 mph (85.71 km/h) |
| 60 mph (96.56 km/h) | 58.1 mph (93.51 km/h) |
| 65 mph (104.61 km/h) | 62.94 mph (101.3 km/h) |
| 70 mph (112.65 km/h) | 67.79 mph (109.09 km/h) |
| 75 mph (120.7 km/h) | 72.63 mph (116.88 km/h) |
| 80 mph (128.75 km/h) | 77.47 mph (124.68 km/h) |
| 85 mph (136.79 km/h) | 82.31 mph (132.47 km/h) |
| 90 mph (144.84 km/h) | 87.15 mph (140.26 km/h) |
| 95 mph (152.89 km/h) | 92 mph (148.05 km/h) |
| 100 mph (160.93 km/h) | 96.84 mph (155.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1812 | 2105 | 2267 | 2367 | 2475 | 2552 | 2637 | 2737 | 2876 | 3015 | 3169 | 3292 | 3516 | 3762 | 3955 | 4079 | 4148 | 4402 | 4757 | 5528 |
Better Fuel Economy Factory Ratios Increased Power
