Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-15 | 185/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.5 (597) | 26.65 (677) | 3.15 (80) 13.4% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 73.84 (1875.53) | 83.73 (2126.86) | 9.89 (251.33) 13.4% |
| Sidewall Height inches (mm) | 4.25 (108) | 5.83 (148) | 1.57 (40) 37% |
| Revolutions per mile (km) | 858.07 (533.18) | 756.68 (470.18) | -101.4 (-63.01) -11.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.68 mph (36.5 km/h) |
| 25 mph (40.23 km/h) | 28.35 mph (45.63 km/h) |
| 30 mph (48.28 km/h) | 34.02 mph (54.75 km/h) |
| 35 mph (56.33 km/h) | 39.69 mph (63.88 km/h) |
| 40 mph (64.37 km/h) | 45.36 mph (73 km/h) |
| 45 mph (72.42 km/h) | 51.03 mph (82.13 km/h) |
| 50 mph (80.47 km/h) | 56.7 mph (91.25 km/h) |
| 55 mph (88.51 km/h) | 62.37 mph (100.38 km/h) |
| 60 mph (96.56 km/h) | 68.04 mph (109.5 km/h) |
| 65 mph (104.61 km/h) | 73.71 mph (118.63 km/h) |
| 70 mph (112.65 km/h) | 79.38 mph (127.75 km/h) |
| 75 mph (120.7 km/h) | 85.05 mph (136.88 km/h) |
| 80 mph (128.75 km/h) | 90.72 mph (146 km/h) |
| 85 mph (136.79 km/h) | 96.39 mph (155.13 km/h) |
| 90 mph (144.84 km/h) | 102.06 mph (164.25 km/h) |
| 95 mph (152.89 km/h) | 107.73 mph (173.38 km/h) |
| 100 mph (160.93 km/h) | 113.4 mph (182.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1926 | 2237 | 2409 | 2516 | 2630 | 2712 | 2802 | 2909 | 3056 | 3204 | 3368 | 3499 | 3736 | 3999 | 4204 | 4335 | 4408 | 4679 | 5056 | 5875 |
Better Fuel Economy Factory Ratios Increased Power
