Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 36/12.5-16.5 | 305/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.03 (915.18) | 33.21 (843.5) | -2.82 (-71.68) -7.8% |
| Width inches (mm) | 12.52 (318) | 12.01 (305) | -0.51 (-13) -4.1% |
| Circum. inches (mm) | 113.19 (2875.12) | 104.33 (2649.93) | -8.87 (-225.19) -7.8% |
| Sidewall Height inches (mm) | 9.77 (248.04) | 6.6 (167.75) | -3.16 (-80.29) -32.4% |
| Revolutions per mile (km) | 559.75 (347.81) | 607.31 (377.37) | 47.57 (29.56) 8.5% |
305/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.43 mph (29.67 km/h) |
| 25 mph (40.23 km/h) | 23.04 mph (37.08 km/h) |
| 30 mph (48.28 km/h) | 27.65 mph (44.5 km/h) |
| 35 mph (56.33 km/h) | 32.26 mph (51.92 km/h) |
| 40 mph (64.37 km/h) | 36.87 mph (59.33 km/h) |
| 45 mph (72.42 km/h) | 41.48 mph (66.75 km/h) |
| 50 mph (80.47 km/h) | 46.08 mph (74.16 km/h) |
| 55 mph (88.51 km/h) | 50.69 mph (81.58 km/h) |
| 60 mph (96.56 km/h) | 55.3 mph (89 km/h) |
| 65 mph (104.61 km/h) | 59.91 mph (96.41 km/h) |
| 70 mph (112.65 km/h) | 64.52 mph (103.83 km/h) |
| 75 mph (120.7 km/h) | 69.13 mph (111.25 km/h) |
| 80 mph (128.75 km/h) | 73.73 mph (118.66 km/h) |
| 85 mph (136.79 km/h) | 78.34 mph (126.08 km/h) |
| 90 mph (144.84 km/h) | 82.95 mph (133.5 km/h) |
| 95 mph (152.89 km/h) | 87.56 mph (140.91 km/h) |
| 100 mph (160.93 km/h) | 92.17 mph (148.33 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1546 | 1795 | 1934 | 2019 | 2111 | 2177 | 2249 | 2335 | 2453 | 2571 | 2703 | 2808 | 2999 | 3209 | 3374 | 3479 | 3538 | 3755 | 4058 | 4715 |
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