Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-18 | 235/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.4 (645.2) | 26.4 (670.6) | 1 (25.4) 3.9% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 79.8 (2026.96) | 82.94 (2106.75) | 3.14 (79.8) 3.9% |
| Sidewall Height inches (mm) | 3.7 (94) | 3.7 (94) | 0 (0) 0% |
| Revolutions per mile (km) | 793.97 (493.35) | 763.9 (474.66) | -30.07 (-18.69) -3.8% |
235/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.79 mph (33.45 km/h) |
| 25 mph (40.23 km/h) | 25.98 mph (41.82 km/h) |
| 30 mph (48.28 km/h) | 31.18 mph (50.18 km/h) |
| 35 mph (56.33 km/h) | 36.38 mph (58.54 km/h) |
| 40 mph (64.37 km/h) | 41.57 mph (66.91 km/h) |
| 45 mph (72.42 km/h) | 46.77 mph (75.27 km/h) |
| 50 mph (80.47 km/h) | 51.97 mph (83.64 km/h) |
| 55 mph (88.51 km/h) | 57.17 mph (92 km/h) |
| 60 mph (96.56 km/h) | 62.36 mph (100.36 km/h) |
| 65 mph (104.61 km/h) | 67.56 mph (108.73 km/h) |
| 70 mph (112.65 km/h) | 72.76 mph (117.09 km/h) |
| 75 mph (120.7 km/h) | 77.95 mph (125.45 km/h) |
| 80 mph (128.75 km/h) | 83.15 mph (133.82 km/h) |
| 85 mph (136.79 km/h) | 88.35 mph (142.18 km/h) |
| 90 mph (144.84 km/h) | 93.54 mph (150.54 km/h) |
| 95 mph (152.89 km/h) | 98.74 mph (158.91 km/h) |
| 100 mph (160.93 km/h) | 103.94 mph (167.27 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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