Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 235/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 26.4 (670.6) | 2.85 (72.4) 12.1% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 73.99 (1879.3) | 82.94 (2106.75) | 8.95 (227.45) 12.1% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 3.7 (94) | 0.93 (23.5) 33.3% |
| Revolutions per mile (km) | 856.35 (532.11) | 763.9 (474.66) | -92.45 (-57.45) -10.8% |
235/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.42 mph (36.08 km/h) |
| 25 mph (40.23 km/h) | 28.03 mph (45.1 km/h) |
| 30 mph (48.28 km/h) | 33.63 mph (54.12 km/h) |
| 35 mph (56.33 km/h) | 39.24 mph (63.14 km/h) |
| 40 mph (64.37 km/h) | 44.84 mph (72.17 km/h) |
| 45 mph (72.42 km/h) | 50.45 mph (81.19 km/h) |
| 50 mph (80.47 km/h) | 56.05 mph (90.21 km/h) |
| 55 mph (88.51 km/h) | 61.66 mph (99.23 km/h) |
| 60 mph (96.56 km/h) | 67.26 mph (108.25 km/h) |
| 65 mph (104.61 km/h) | 72.87 mph (117.27 km/h) |
| 70 mph (112.65 km/h) | 78.47 mph (126.29 km/h) |
| 75 mph (120.7 km/h) | 84.08 mph (135.31 km/h) |
| 80 mph (128.75 km/h) | 89.68 mph (144.33 km/h) |
| 85 mph (136.79 km/h) | 95.29 mph (153.35 km/h) |
| 90 mph (144.84 km/h) | 100.89 mph (162.37 km/h) |
| 95 mph (152.89 km/h) | 106.5 mph (171.39 km/h) |
| 100 mph (160.93 km/h) | 112.1 mph (180.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1944 | 2258 | 2432 | 2540 | 2655 | 2738 | 2829 | 2937 | 3086 | 3234 | 3400 | 3532 | 3772 | 4037 | 4244 | 4376 | 4450 | 4723 | 5104 | 5931 |
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