Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 340/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 39.42 (1001.2) | 6.81 (173) 20.9% |
| Width inches (mm) | 12.01 (305) | 13.39 (340) | 1.38 (35) 11.5% |
| Circum. inches (mm) | 102.44 (2601.87) | 123.83 (3145.36) | 21.4 (543.5) 20.9% |
| Sidewall Height inches (mm) | 4.8 (122) | 10.71 (272) | 5.91 (150) 123% |
| Revolutions per mile (km) | 618.53 (384.34) | 511.66 (317.93) | -106.88 (-66.41) -17.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.18 mph (38.91 km/h) |
| 25 mph (40.23 km/h) | 30.22 mph (48.64 km/h) |
| 30 mph (48.28 km/h) | 36.27 mph (58.37 km/h) |
| 35 mph (56.33 km/h) | 42.31 mph (68.09 km/h) |
| 40 mph (64.37 km/h) | 48.36 mph (77.82 km/h) |
| 45 mph (72.42 km/h) | 54.4 mph (87.55 km/h) |
| 50 mph (80.47 km/h) | 60.44 mph (97.28 km/h) |
| 55 mph (88.51 km/h) | 66.49 mph (107 km/h) |
| 60 mph (96.56 km/h) | 72.53 mph (116.73 km/h) |
| 65 mph (104.61 km/h) | 78.58 mph (126.46 km/h) |
| 70 mph (112.65 km/h) | 84.62 mph (136.19 km/h) |
| 75 mph (120.7 km/h) | 90.67 mph (145.91 km/h) |
| 80 mph (128.75 km/h) | 96.71 mph (155.64 km/h) |
| 85 mph (136.79 km/h) | 102.76 mph (165.37 km/h) |
| 90 mph (144.84 km/h) | 108.8 mph (175.1 km/h) |
| 95 mph (152.89 km/h) | 114.84 mph (184.82 km/h) |
| 100 mph (160.93 km/h) | 120.89 mph (194.55 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1302 | 1513 | 1629 | 1701 | 1779 | 1834 | 1895 | 1967 | 2067 | 2166 | 2277 | 2366 | 2527 | 2704 | 2842 | 2931 | 2981 | 3164 | 3419 | 3973 |
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