Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 340/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 40.08 (1018) | 7.47 (189.8) 22.9% |
| Width inches (mm) | 12.01 (305) | 13.39 (340) | 1.38 (35) 11.5% |
| Circum. inches (mm) | 102.44 (2601.87) | 125.91 (3198.14) | 23.48 (596.27) 22.9% |
| Sidewall Height inches (mm) | 4.8 (122) | 10.04 (255) | 5.24 (133) 109% |
| Revolutions per mile (km) | 618.53 (384.34) | 503.21 (312.68) | -115.32 (-71.66) -18.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.58 mph (39.56 km/h) |
| 25 mph (40.23 km/h) | 30.73 mph (49.45 km/h) |
| 30 mph (48.28 km/h) | 36.88 mph (59.34 km/h) |
| 35 mph (56.33 km/h) | 43.02 mph (69.24 km/h) |
| 40 mph (64.37 km/h) | 49.17 mph (79.13 km/h) |
| 45 mph (72.42 km/h) | 55.31 mph (89.02 km/h) |
| 50 mph (80.47 km/h) | 61.46 mph (98.91 km/h) |
| 55 mph (88.51 km/h) | 67.6 mph (108.8 km/h) |
| 60 mph (96.56 km/h) | 73.75 mph (118.69 km/h) |
| 65 mph (104.61 km/h) | 79.9 mph (128.58 km/h) |
| 70 mph (112.65 km/h) | 86.04 mph (138.47 km/h) |
| 75 mph (120.7 km/h) | 92.19 mph (148.36 km/h) |
| 80 mph (128.75 km/h) | 98.33 mph (158.25 km/h) |
| 85 mph (136.79 km/h) | 104.48 mph (168.14 km/h) |
| 90 mph (144.84 km/h) | 110.63 mph (178.03 km/h) |
| 95 mph (152.89 km/h) | 116.77 mph (187.93 km/h) |
| 100 mph (160.93 km/h) | 122.92 mph (197.82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1281 | 1488 | 1602 | 1673 | 1749 | 1804 | 1864 | 1934 | 2033 | 2131 | 2240 | 2327 | 2485 | 2659 | 2795 | 2883 | 2932 | 3112 | 3362 | 3907 |
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