Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-20 | 235/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.72 (704) | 27.4 (696) | -0.31 (-8) -1.1% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 87.07 (2211.68) | 86.08 (2186.55) | -0.99 (-25.13) -1.1% |
| Sidewall Height inches (mm) | 3.86 (98) | 3.7 (94) | -0.16 (-4) -4.1% |
| Revolutions per mile (km) | 727.66 (452.14) | 736.02 (457.34) | 8.36 (5.2) 1.1% |
235/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.82 km/h) |
| 25 mph (40.23 km/h) | 24.72 mph (39.78 km/h) |
| 30 mph (48.28 km/h) | 29.66 mph (47.73 km/h) |
| 35 mph (56.33 km/h) | 34.6 mph (55.69 km/h) |
| 40 mph (64.37 km/h) | 39.55 mph (63.64 km/h) |
| 45 mph (72.42 km/h) | 44.49 mph (71.6 km/h) |
| 50 mph (80.47 km/h) | 49.43 mph (79.55 km/h) |
| 55 mph (88.51 km/h) | 54.38 mph (87.51 km/h) |
| 60 mph (96.56 km/h) | 59.32 mph (95.46 km/h) |
| 65 mph (104.61 km/h) | 64.26 mph (103.42 km/h) |
| 70 mph (112.65 km/h) | 69.2 mph (111.37 km/h) |
| 75 mph (120.7 km/h) | 74.15 mph (119.33 km/h) |
| 80 mph (128.75 km/h) | 79.09 mph (127.28 km/h) |
| 85 mph (136.79 km/h) | 84.03 mph (135.24 km/h) |
| 90 mph (144.84 km/h) | 88.98 mph (143.2 km/h) |
| 95 mph (152.89 km/h) | 93.92 mph (151.15 km/h) |
| 100 mph (160.93 km/h) | 98.86 mph (159.11 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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