Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-20 | 235/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.09 (688) | 27.4 (696) | 0.31 (8) 1.2% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 85.1 (2161.42) | 86.08 (2186.55) | 0.99 (25.13) 1.2% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.7 (94) | 0.16 (4) 4.4% |
| Revolutions per mile (km) | 744.58 (462.66) | 736.02 (457.34) | -8.56 (-5.32) -1.1% |
235/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.23 mph (32.56 km/h) |
| 25 mph (40.23 km/h) | 25.29 mph (40.7 km/h) |
| 30 mph (48.28 km/h) | 30.35 mph (48.84 km/h) |
| 35 mph (56.33 km/h) | 35.41 mph (56.98 km/h) |
| 40 mph (64.37 km/h) | 40.47 mph (65.12 km/h) |
| 45 mph (72.42 km/h) | 45.52 mph (73.26 km/h) |
| 50 mph (80.47 km/h) | 50.58 mph (81.4 km/h) |
| 55 mph (88.51 km/h) | 55.64 mph (89.54 km/h) |
| 60 mph (96.56 km/h) | 60.7 mph (97.68 km/h) |
| 65 mph (104.61 km/h) | 65.76 mph (105.82 km/h) |
| 70 mph (112.65 km/h) | 70.81 mph (113.96 km/h) |
| 75 mph (120.7 km/h) | 75.87 mph (122.1 km/h) |
| 80 mph (128.75 km/h) | 80.93 mph (130.24 km/h) |
| 85 mph (136.79 km/h) | 85.99 mph (138.39 km/h) |
| 90 mph (144.84 km/h) | 91.05 mph (146.53 km/h) |
| 95 mph (152.89 km/h) | 96.1 mph (154.67 km/h) |
| 100 mph (160.93 km/h) | 101.16 mph (162.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1873 | 2176 | 2343 | 2447 | 2558 | 2638 | 2726 | 2829 | 2973 | 3116 | 3276 | 3403 | 3634 | 3890 | 4089 | 4216 | 4288 | 4551 | 4918 | 5715 |
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