Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 235/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 29.25 (743) | 0.28 (7.1) 1% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 91.02 (2311.9) | 91.9 (2334.2) | 0.88 (22.31) 1% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.63 (117.5) | 0.64 (16.25) 16% |
| Revolutions per mile (km) | 696.11 (432.54) | 689.46 (428.41) | -6.65 (-4.13) -1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.19 mph (32.5 km/h) |
| 25 mph (40.23 km/h) | 25.24 mph (40.62 km/h) |
| 30 mph (48.28 km/h) | 30.29 mph (48.75 km/h) |
| 35 mph (56.33 km/h) | 35.34 mph (56.87 km/h) |
| 40 mph (64.37 km/h) | 40.39 mph (64.99 km/h) |
| 45 mph (72.42 km/h) | 45.43 mph (73.12 km/h) |
| 50 mph (80.47 km/h) | 50.48 mph (81.24 km/h) |
| 55 mph (88.51 km/h) | 55.53 mph (89.37 km/h) |
| 60 mph (96.56 km/h) | 60.58 mph (97.49 km/h) |
| 65 mph (104.61 km/h) | 65.63 mph (105.62 km/h) |
| 70 mph (112.65 km/h) | 70.68 mph (113.74 km/h) |
| 75 mph (120.7 km/h) | 75.72 mph (121.87 km/h) |
| 80 mph (128.75 km/h) | 80.77 mph (129.99 km/h) |
| 85 mph (136.79 km/h) | 85.82 mph (138.11 km/h) |
| 90 mph (144.84 km/h) | 90.87 mph (146.24 km/h) |
| 95 mph (152.89 km/h) | 95.92 mph (154.36 km/h) |
| 100 mph (160.93 km/h) | 100.96 mph (162.49 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1755 | 2038 | 2195 | 2292 | 2397 | 2471 | 2553 | 2650 | 2785 | 2919 | 3069 | 3188 | 3405 | 3643 | 3830 | 3950 | 4017 | 4263 | 4607 | 5353 |
Better Fuel Economy Factory Ratios Increased Power
