Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 135/90-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 21.57 (547.8) | 1.06 (27) 5.2% |
| Width inches (mm) | 5.31 (135) | 5.31 (135) | 0 (0) 0% |
| Circum. inches (mm) | 64.42 (1636.14) | 67.75 (1720.96) | 3.34 (84.82) 5.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.78 (121.5) | 0.53 (13.5) 12.5% |
| Revolutions per mile (km) | 983.62 (611.19) | 935.14 (581.07) | -48.48 (-30.12) -4.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.04 mph (33.86 km/h) |
| 25 mph (40.23 km/h) | 26.3 mph (42.32 km/h) |
| 30 mph (48.28 km/h) | 31.56 mph (50.78 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.25 km/h) |
| 40 mph (64.37 km/h) | 42.07 mph (67.71 km/h) |
| 45 mph (72.42 km/h) | 47.33 mph (76.18 km/h) |
| 50 mph (80.47 km/h) | 52.59 mph (84.64 km/h) |
| 55 mph (88.51 km/h) | 57.85 mph (93.1 km/h) |
| 60 mph (96.56 km/h) | 63.11 mph (101.57 km/h) |
| 65 mph (104.61 km/h) | 68.37 mph (110.03 km/h) |
| 70 mph (112.65 km/h) | 73.63 mph (118.49 km/h) |
| 75 mph (120.7 km/h) | 78.89 mph (126.96 km/h) |
| 80 mph (128.75 km/h) | 84.15 mph (135.42 km/h) |
| 85 mph (136.79 km/h) | 89.41 mph (143.89 km/h) |
| 90 mph (144.84 km/h) | 94.67 mph (152.35 km/h) |
| 95 mph (152.89 km/h) | 99.93 mph (160.81 km/h) |
| 100 mph (160.93 km/h) | 105.18 mph (169.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
