Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 400/70-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 42.05 (1068) | 9.44 (239.8) 29% |
| Width inches (mm) | 12.01 (305) | 15.75 (400) | 3.74 (95) 31.1% |
| Circum. inches (mm) | 102.44 (2601.87) | 132.1 (3355.22) | 29.66 (753.35) 29% |
| Sidewall Height inches (mm) | 4.8 (122) | 11.02 (280) | 6.22 (158) 129.5% |
| Revolutions per mile (km) | 618.53 (384.34) | 479.65 (298.04) | -138.88 (-86.3) -22.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.79 mph (41.51 km/h) |
| 25 mph (40.23 km/h) | 32.24 mph (51.88 km/h) |
| 30 mph (48.28 km/h) | 38.69 mph (62.26 km/h) |
| 35 mph (56.33 km/h) | 45.13 mph (72.64 km/h) |
| 40 mph (64.37 km/h) | 51.58 mph (83.01 km/h) |
| 45 mph (72.42 km/h) | 58.03 mph (93.39 km/h) |
| 50 mph (80.47 km/h) | 64.48 mph (103.77 km/h) |
| 55 mph (88.51 km/h) | 70.92 mph (114.14 km/h) |
| 60 mph (96.56 km/h) | 77.37 mph (124.52 km/h) |
| 65 mph (104.61 km/h) | 83.82 mph (134.9 km/h) |
| 70 mph (112.65 km/h) | 90.27 mph (145.27 km/h) |
| 75 mph (120.7 km/h) | 96.72 mph (155.65 km/h) |
| 80 mph (128.75 km/h) | 103.16 mph (166.03 km/h) |
| 85 mph (136.79 km/h) | 109.61 mph (176.4 km/h) |
| 90 mph (144.84 km/h) | 116.06 mph (186.78 km/h) |
| 95 mph (152.89 km/h) | 122.51 mph (197.16 km/h) |
| 100 mph (160.93 km/h) | 128.95 mph (207.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1221 | 1418 | 1527 | 1595 | 1667 | 1719 | 1776 | 1844 | 1937 | 2031 | 2135 | 2218 | 2369 | 2535 | 2665 | 2748 | 2794 | 2966 | 3205 | 3724 |
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