Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 235/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 24.4 (619.8) | -0.91 (-23.2) -3.6% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 79.53 (2020.04) | 76.66 (1947.16) | -2.87 (-72.88) -3.6% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 3.7 (94) | 1.04 (26.5) 39.3% |
| Revolutions per mile (km) | 796.69 (495.04) | 826.51 (513.57) | 29.82 (18.53) 3.7% |
235/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.28 mph (31.03 km/h) |
| 25 mph (40.23 km/h) | 24.1 mph (38.78 km/h) |
| 30 mph (48.28 km/h) | 28.92 mph (46.54 km/h) |
| 35 mph (56.33 km/h) | 33.74 mph (54.29 km/h) |
| 40 mph (64.37 km/h) | 38.56 mph (62.05 km/h) |
| 45 mph (72.42 km/h) | 43.38 mph (69.81 km/h) |
| 50 mph (80.47 km/h) | 48.2 mph (77.56 km/h) |
| 55 mph (88.51 km/h) | 53.02 mph (85.32 km/h) |
| 60 mph (96.56 km/h) | 57.84 mph (93.08 km/h) |
| 65 mph (104.61 km/h) | 62.65 mph (100.83 km/h) |
| 70 mph (112.65 km/h) | 67.47 mph (108.59 km/h) |
| 75 mph (120.7 km/h) | 72.29 mph (116.35 km/h) |
| 80 mph (128.75 km/h) | 77.11 mph (124.1 km/h) |
| 85 mph (136.79 km/h) | 81.93 mph (131.86 km/h) |
| 90 mph (144.84 km/h) | 86.75 mph (139.62 km/h) |
| 95 mph (152.89 km/h) | 91.57 mph (147.37 km/h) |
| 100 mph (160.93 km/h) | 96.39 mph (155.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2103 | 2443 | 2631 | 2748 | 2873 | 2963 | 3061 | 3177 | 3338 | 3500 | 3679 | 3822 | 4081 | 4368 | 4591 | 4735 | 4815 | 5111 | 5522 | 6417 |
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