Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 290/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 36.27 (921.2) | 5.87 (149) 19.3% |
| Width inches (mm) | 6.89 (175) | 11.42 (290) | 4.53 (115) 65.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 113.94 (2894.04) | 18.43 (468.1) 19.3% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 9.13 (232) | 2.93 (74.5) 47.3% |
| Revolutions per mile (km) | 663.39 (412.21) | 556.09 (345.54) | -107.3 (-66.67) -16.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.86 mph (38.4 km/h) |
| 25 mph (40.23 km/h) | 29.82 mph (48 km/h) |
| 30 mph (48.28 km/h) | 35.79 mph (57.6 km/h) |
| 35 mph (56.33 km/h) | 41.75 mph (67.2 km/h) |
| 40 mph (64.37 km/h) | 47.72 mph (76.8 km/h) |
| 45 mph (72.42 km/h) | 53.68 mph (86.39 km/h) |
| 50 mph (80.47 km/h) | 59.65 mph (95.99 km/h) |
| 55 mph (88.51 km/h) | 65.61 mph (105.59 km/h) |
| 60 mph (96.56 km/h) | 71.58 mph (115.19 km/h) |
| 65 mph (104.61 km/h) | 77.54 mph (124.79 km/h) |
| 70 mph (112.65 km/h) | 83.51 mph (134.39 km/h) |
| 75 mph (120.7 km/h) | 89.47 mph (143.99 km/h) |
| 80 mph (128.75 km/h) | 95.44 mph (153.59 km/h) |
| 85 mph (136.79 km/h) | 101.4 mph (163.19 km/h) |
| 90 mph (144.84 km/h) | 107.37 mph (172.79 km/h) |
| 95 mph (152.89 km/h) | 113.33 mph (182.39 km/h) |
| 100 mph (160.93 km/h) | 119.3 mph (191.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1415 | 1644 | 1770 | 1849 | 1933 | 1993 | 2059 | 2138 | 2246 | 2355 | 2475 | 2571 | 2746 | 2939 | 3089 | 3186 | 3240 | 3438 | 3716 | 4318 |
Better Fuel Economy Factory Ratios Increased Power
