Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-19 | 255/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.55 (623.6) | 27.03 (686.6) | 2.48 (63) 10.1% |
| Width inches (mm) | 9.25 (235) | 10.04 (255) | 0.79 (20) 8.5% |
| Circum. inches (mm) | 77.13 (1959.1) | 84.92 (2157.02) | 7.79 (197.92) 10.1% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 4.02 (102) | 1.24 (31.5) 44.7% |
| Revolutions per mile (km) | 821.47 (510.44) | 746.1 (463.6) | -75.38 (-46.84) -9.2% |
255/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.02 mph (35.44 km/h) |
| 25 mph (40.23 km/h) | 27.53 mph (44.3 km/h) |
| 30 mph (48.28 km/h) | 33.03 mph (53.16 km/h) |
| 35 mph (56.33 km/h) | 38.54 mph (62.02 km/h) |
| 40 mph (64.37 km/h) | 44.04 mph (70.88 km/h) |
| 45 mph (72.42 km/h) | 49.55 mph (79.74 km/h) |
| 50 mph (80.47 km/h) | 55.05 mph (88.6 km/h) |
| 55 mph (88.51 km/h) | 60.56 mph (97.46 km/h) |
| 60 mph (96.56 km/h) | 66.06 mph (106.32 km/h) |
| 65 mph (104.61 km/h) | 71.57 mph (115.18 km/h) |
| 70 mph (112.65 km/h) | 77.07 mph (124.04 km/h) |
| 75 mph (120.7 km/h) | 82.58 mph (132.9 km/h) |
| 80 mph (128.75 km/h) | 88.08 mph (141.75 km/h) |
| 85 mph (136.79 km/h) | 93.59 mph (150.61 km/h) |
| 90 mph (144.84 km/h) | 99.09 mph (159.47 km/h) |
| 95 mph (152.89 km/h) | 104.6 mph (168.33 km/h) |
| 100 mph (160.93 km/h) | 110.1 mph (177.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1899 | 2206 | 2375 | 2480 | 2594 | 2674 | 2763 | 2868 | 3014 | 3159 | 3321 | 3450 | 3684 | 3943 | 4145 | 4274 | 4347 | 4613 | 4985 | 5793 |
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