Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-19 | 235/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.89 (657.6) | 25.4 (645.2) | -0.49 (-12.4) -1.9% |
| Width inches (mm) | 4.92 (125) | 9.25 (235) | 4.33 (110) 88% |
| Circum. inches (mm) | 81.34 (2065.91) | 79.8 (2026.96) | -1.53 (-38.96) -1.9% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 3.7 (94) | 0.26 (6.5) 7.4% |
| Revolutions per mile (km) | 779 (484.05) | 793.97 (493.35) | 14.97 (9.3) 1.9% |
235/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.62 mph (31.58 km/h) |
| 25 mph (40.23 km/h) | 24.53 mph (39.48 km/h) |
| 30 mph (48.28 km/h) | 29.43 mph (47.37 km/h) |
| 35 mph (56.33 km/h) | 34.34 mph (55.27 km/h) |
| 40 mph (64.37 km/h) | 39.25 mph (63.16 km/h) |
| 45 mph (72.42 km/h) | 44.15 mph (71.06 km/h) |
| 50 mph (80.47 km/h) | 49.06 mph (78.95 km/h) |
| 55 mph (88.51 km/h) | 53.96 mph (86.85 km/h) |
| 60 mph (96.56 km/h) | 58.87 mph (94.74 km/h) |
| 65 mph (104.61 km/h) | 63.77 mph (102.64 km/h) |
| 70 mph (112.65 km/h) | 68.68 mph (110.53 km/h) |
| 75 mph (120.7 km/h) | 73.59 mph (118.43 km/h) |
| 80 mph (128.75 km/h) | 78.49 mph (126.32 km/h) |
| 85 mph (136.79 km/h) | 83.4 mph (134.22 km/h) |
| 90 mph (144.84 km/h) | 88.3 mph (142.11 km/h) |
| 95 mph (152.89 km/h) | 93.21 mph (150.01 km/h) |
| 100 mph (160.93 km/h) | 98.11 mph (157.9 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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