Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/35-18 | 235/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.03 (635.7) | 25.4 (645.2) | 0.37 (9.5) 1.5% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 78.63 (1997.11) | 79.8 (2026.96) | 1.18 (29.85) 1.5% |
| Sidewall Height inches (mm) | 3.51 (89.25) | 3.7 (94) | 0.19 (4.75) 5.3% |
| Revolutions per mile (km) | 805.84 (500.72) | 793.97 (493.35) | -11.87 (-7.37) -1.5% |
235/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.3 mph (32.67 km/h) |
| 25 mph (40.23 km/h) | 25.37 mph (40.83 km/h) |
| 30 mph (48.28 km/h) | 30.45 mph (49 km/h) |
| 35 mph (56.33 km/h) | 35.52 mph (57.17 km/h) |
| 40 mph (64.37 km/h) | 40.6 mph (65.34 km/h) |
| 45 mph (72.42 km/h) | 45.67 mph (73.5 km/h) |
| 50 mph (80.47 km/h) | 50.75 mph (81.67 km/h) |
| 55 mph (88.51 km/h) | 55.82 mph (89.84 km/h) |
| 60 mph (96.56 km/h) | 60.9 mph (98 km/h) |
| 65 mph (104.61 km/h) | 65.97 mph (106.17 km/h) |
| 70 mph (112.65 km/h) | 71.05 mph (114.34 km/h) |
| 75 mph (120.7 km/h) | 76.12 mph (122.5 km/h) |
| 80 mph (128.75 km/h) | 81.2 mph (130.67 km/h) |
| 85 mph (136.79 km/h) | 86.27 mph (138.84 km/h) |
| 90 mph (144.84 km/h) | 91.34 mph (147.01 km/h) |
| 95 mph (152.89 km/h) | 96.42 mph (155.17 km/h) |
| 100 mph (160.93 km/h) | 101.49 mph (163.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 2347 | 2528 | 2640 | 2760 | 2846 | 2940 | 3052 | 3207 | 3362 | 3534 | 3671 | 3921 | 4196 | 4411 | 4548 | 4626 | 4909 | 5305 | 6165 |
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