Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-18 | 245/45-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.4 (645.2) | 27.68 (703.1) | 2.28 (57.9) 9% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 79.8 (2026.96) | 86.96 (2208.85) | 7.16 (181.9) 9% |
| Sidewall Height inches (mm) | 3.7 (94) | 4.34 (110.25) | 0.64 (16.25) 17.3% |
| Revolutions per mile (km) | 793.97 (493.35) | 728.59 (452.72) | -65.38 (-40.63) -8.2% |
245/45-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.79 mph (35.08 km/h) |
| 25 mph (40.23 km/h) | 27.24 mph (43.84 km/h) |
| 30 mph (48.28 km/h) | 32.69 mph (52.61 km/h) |
| 35 mph (56.33 km/h) | 38.14 mph (61.38 km/h) |
| 40 mph (64.37 km/h) | 43.59 mph (70.15 km/h) |
| 45 mph (72.42 km/h) | 49.04 mph (78.92 km/h) |
| 50 mph (80.47 km/h) | 54.49 mph (87.69 km/h) |
| 55 mph (88.51 km/h) | 59.94 mph (96.46 km/h) |
| 60 mph (96.56 km/h) | 65.38 mph (105.23 km/h) |
| 65 mph (104.61 km/h) | 70.83 mph (114 km/h) |
| 70 mph (112.65 km/h) | 76.28 mph (122.76 km/h) |
| 75 mph (120.7 km/h) | 81.73 mph (131.53 km/h) |
| 80 mph (128.75 km/h) | 87.18 mph (140.3 km/h) |
| 85 mph (136.79 km/h) | 92.63 mph (149.07 km/h) |
| 90 mph (144.84 km/h) | 98.08 mph (157.84 km/h) |
| 95 mph (152.89 km/h) | 103.53 mph (166.61 km/h) |
| 100 mph (160.93 km/h) | 108.97 mph (175.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1854 | 2154 | 2320 | 2422 | 2533 | 2612 | 2698 | 2801 | 2943 | 3085 | 3243 | 3369 | 3598 | 3850 | 4047 | 4174 | 4245 | 4505 | 4868 | 5657 |
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