Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 185/65-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 23.47 (596.1) | 2.96 (75.3) 14.5% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 64.42 (1636.14) | 73.73 (1872.7) | 9.31 (236.56) 14.5% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.73 (120.25) | 0.48 (12.25) 11.3% |
| Revolutions per mile (km) | 983.62 (611.19) | 859.37 (533.99) | -124.25 (-77.21) -12.6% |
185/65-14 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.89 mph (36.84 km/h) |
| 25 mph (40.23 km/h) | 28.61 mph (46.05 km/h) |
| 30 mph (48.28 km/h) | 34.34 mph (55.26 km/h) |
| 35 mph (56.33 km/h) | 40.06 mph (64.47 km/h) |
| 40 mph (64.37 km/h) | 45.78 mph (73.68 km/h) |
| 45 mph (72.42 km/h) | 51.51 mph (82.89 km/h) |
| 50 mph (80.47 km/h) | 57.23 mph (92.1 km/h) |
| 55 mph (88.51 km/h) | 62.95 mph (101.31 km/h) |
| 60 mph (96.56 km/h) | 68.68 mph (110.52 km/h) |
| 65 mph (104.61 km/h) | 74.4 mph (119.73 km/h) |
| 70 mph (112.65 km/h) | 80.12 mph (128.94 km/h) |
| 75 mph (120.7 km/h) | 85.84 mph (138.15 km/h) |
| 80 mph (128.75 km/h) | 91.57 mph (147.36 km/h) |
| 85 mph (136.79 km/h) | 97.29 mph (156.57 km/h) |
| 90 mph (144.84 km/h) | 103.01 mph (165.78 km/h) |
| 95 mph (152.89 km/h) | 108.74 mph (174.99 km/h) |
| 100 mph (160.93 km/h) | 114.46 mph (184.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2187 | 2541 | 2736 | 2857 | 2987 | 3080 | 3183 | 3304 | 3471 | 3639 | 3825 | 3974 | 4244 | 4541 | 4774 | 4923 | 5007 | 5314 | 5742 | 6672 |
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