Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-19 | 345/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.15 (689.6) | 27.87 (707.8) | 0.72 (18.2) 2.6% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 85.29 (2166.44) | 87.54 (2223.62) | 2.25 (57.18) 2.6% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 5.43 (138) | 1.36 (34.5) 33.3% |
| Revolutions per mile (km) | 742.85 (461.59) | 723.75 (449.72) | -19.1 (-11.87) -2.6% |
345/40-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.53 mph (33.04 km/h) |
| 25 mph (40.23 km/h) | 25.66 mph (41.3 km/h) |
| 30 mph (48.28 km/h) | 30.79 mph (49.55 km/h) |
| 35 mph (56.33 km/h) | 35.92 mph (57.81 km/h) |
| 40 mph (64.37 km/h) | 41.06 mph (66.07 km/h) |
| 45 mph (72.42 km/h) | 46.19 mph (74.33 km/h) |
| 50 mph (80.47 km/h) | 51.32 mph (82.59 km/h) |
| 55 mph (88.51 km/h) | 56.45 mph (90.85 km/h) |
| 60 mph (96.56 km/h) | 61.58 mph (99.11 km/h) |
| 65 mph (104.61 km/h) | 66.72 mph (107.37 km/h) |
| 70 mph (112.65 km/h) | 71.85 mph (115.63 km/h) |
| 75 mph (120.7 km/h) | 76.98 mph (123.89 km/h) |
| 80 mph (128.75 km/h) | 82.11 mph (132.15 km/h) |
| 85 mph (136.79 km/h) | 87.24 mph (140.4 km/h) |
| 90 mph (144.84 km/h) | 92.38 mph (148.66 km/h) |
| 95 mph (152.89 km/h) | 97.51 mph (156.92 km/h) |
| 100 mph (160.93 km/h) | 102.64 mph (165.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1842 | 2140 | 2304 | 2406 | 2516 | 2594 | 2680 | 2782 | 2923 | 3064 | 3221 | 3347 | 3574 | 3825 | 4021 | 4146 | 4217 | 4475 | 4836 | 5619 |
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