Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-15 | 185/80-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.44 (570) | 25.65 (651.6) | 3.21 (81.6) 14.3% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 70.5 (1790.71) | 80.59 (2047.06) | 10.09 (256.35) 14.3% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 5.83 (148) | 2.11 (53.5) 56.6% |
| Revolutions per mile (km) | 898.72 (558.44) | 786.17 (488.5) | -112.55 (-69.93) -12.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.86 mph (36.79 km/h) |
| 25 mph (40.23 km/h) | 28.58 mph (45.99 km/h) |
| 30 mph (48.28 km/h) | 34.29 mph (55.19 km/h) |
| 35 mph (56.33 km/h) | 40.01 mph (64.39 km/h) |
| 40 mph (64.37 km/h) | 45.73 mph (73.59 km/h) |
| 45 mph (72.42 km/h) | 51.44 mph (82.79 km/h) |
| 50 mph (80.47 km/h) | 57.16 mph (91.99 km/h) |
| 55 mph (88.51 km/h) | 62.87 mph (101.19 km/h) |
| 60 mph (96.56 km/h) | 68.59 mph (110.38 km/h) |
| 65 mph (104.61 km/h) | 74.31 mph (119.58 km/h) |
| 70 mph (112.65 km/h) | 80.02 mph (128.78 km/h) |
| 75 mph (120.7 km/h) | 85.74 mph (137.98 km/h) |
| 80 mph (128.75 km/h) | 91.45 mph (147.18 km/h) |
| 85 mph (136.79 km/h) | 97.17 mph (156.38 km/h) |
| 90 mph (144.84 km/h) | 102.88 mph (165.58 km/h) |
| 95 mph (152.89 km/h) | 108.6 mph (174.78 km/h) |
| 100 mph (160.93 km/h) | 114.32 mph (183.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | 2324 | 2503 | 2614 | 2733 | 2818 | 2912 | 3022 | 3176 | 3329 | 3499 | 3635 | 3882 | 4155 | 4367 | 4504 | 4580 | 4861 | 5253 | 6104 |
Better Fuel Economy Factory Ratios Increased Power
