Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 235/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 26.8 (680.8) | 6.3 (160) 30.7% |
| Width inches (mm) | 5.31 (135) | 9.25 (235) | 3.94 (100) 74.1% |
| Circum. inches (mm) | 64.42 (1636.14) | 84.2 (2138.8) | 19.79 (502.65) 30.7% |
| Sidewall Height inches (mm) | 4.25 (108) | 7.4 (188) | 3.15 (80) 74.1% |
| Revolutions per mile (km) | 983.62 (611.19) | 752.45 (467.55) | -231.17 (-143.64) -23.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.14 mph (42.08 km/h) |
| 25 mph (40.23 km/h) | 32.68 mph (52.59 km/h) |
| 30 mph (48.28 km/h) | 39.22 mph (63.11 km/h) |
| 35 mph (56.33 km/h) | 45.75 mph (73.63 km/h) |
| 40 mph (64.37 km/h) | 52.29 mph (84.15 km/h) |
| 45 mph (72.42 km/h) | 58.82 mph (94.67 km/h) |
| 50 mph (80.47 km/h) | 65.36 mph (105.19 km/h) |
| 55 mph (88.51 km/h) | 71.9 mph (115.71 km/h) |
| 60 mph (96.56 km/h) | 78.43 mph (126.23 km/h) |
| 65 mph (104.61 km/h) | 84.97 mph (136.75 km/h) |
| 70 mph (112.65 km/h) | 91.51 mph (147.26 km/h) |
| 75 mph (120.7 km/h) | 98.04 mph (157.78 km/h) |
| 80 mph (128.75 km/h) | 104.58 mph (168.3 km/h) |
| 85 mph (136.79 km/h) | 111.11 mph (178.82 km/h) |
| 90 mph (144.84 km/h) | 117.65 mph (189.34 km/h) |
| 95 mph (152.89 km/h) | 124.19 mph (199.86 km/h) |
| 100 mph (160.93 km/h) | 130.72 mph (210.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1915 | 2224 | 2396 | 2502 | 2616 | 2697 | 2787 | 2893 | 3039 | 3186 | 3349 | 3479 | 3716 | 3976 | 4180 | 4310 | 4384 | 4653 | 5027 | 5842 |
Better Fuel Economy Factory Ratios Increased Power
