Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/35-20 | 235/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.48 (672.5) | 27.4 (696) | 0.93 (23.5) 3.5% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 83.18 (2112.72) | 86.08 (2186.55) | 2.91 (73.83) 3.5% |
| Sidewall Height inches (mm) | 3.24 (82.25) | 3.7 (94) | 0.46 (11.75) 14.3% |
| Revolutions per mile (km) | 761.74 (473.32) | 736.02 (457.34) | -25.72 (-15.98) -3.4% |
235/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.31 km/h) |
| 25 mph (40.23 km/h) | 25.87 mph (41.64 km/h) |
| 30 mph (48.28 km/h) | 31.05 mph (49.97 km/h) |
| 35 mph (56.33 km/h) | 36.22 mph (58.3 km/h) |
| 40 mph (64.37 km/h) | 41.4 mph (66.62 km/h) |
| 45 mph (72.42 km/h) | 46.57 mph (74.95 km/h) |
| 50 mph (80.47 km/h) | 51.75 mph (83.28 km/h) |
| 55 mph (88.51 km/h) | 56.92 mph (91.61 km/h) |
| 60 mph (96.56 km/h) | 62.1 mph (99.94 km/h) |
| 65 mph (104.61 km/h) | 67.27 mph (108.26 km/h) |
| 70 mph (112.65 km/h) | 72.45 mph (116.59 km/h) |
| 75 mph (120.7 km/h) | 77.62 mph (124.92 km/h) |
| 80 mph (128.75 km/h) | 82.8 mph (133.25 km/h) |
| 85 mph (136.79 km/h) | 87.97 mph (141.57 km/h) |
| 90 mph (144.84 km/h) | 93.14 mph (149.9 km/h) |
| 95 mph (152.89 km/h) | 98.32 mph (158.23 km/h) |
| 100 mph (160.93 km/h) | 103.49 mph (166.56 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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