Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-18 | 80/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.38 (619.2) | 23.67 (601.2) | -0.71 (-18) -2.9% |
| Width inches (mm) | 3.54 (90) | 3.15 (80) | -0.39 (-10) -11.1% |
| Circum. inches (mm) | 76.59 (1945.27) | 74.36 (1888.73) | -2.23 (-56.55) -2.9% |
| Sidewall Height inches (mm) | 3.19 (81) | 2.83 (72) | -0.35 (-9) -11.1% |
| Revolutions per mile (km) | 827.31 (514.07) | 852.08 (529.46) | 24.77 (15.39) 3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.25 km/h) |
| 25 mph (40.23 km/h) | 24.27 mph (39.06 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.88 km/h) |
| 35 mph (56.33 km/h) | 33.98 mph (54.69 km/h) |
| 40 mph (64.37 km/h) | 38.84 mph (62.5 km/h) |
| 45 mph (72.42 km/h) | 43.69 mph (70.32 km/h) |
| 50 mph (80.47 km/h) | 48.55 mph (78.13 km/h) |
| 55 mph (88.51 km/h) | 53.4 mph (85.94 km/h) |
| 60 mph (96.56 km/h) | 58.26 mph (93.75 km/h) |
| 65 mph (104.61 km/h) | 63.11 mph (101.57 km/h) |
| 70 mph (112.65 km/h) | 67.97 mph (109.38 km/h) |
| 75 mph (120.7 km/h) | 72.82 mph (117.19 km/h) |
| 80 mph (128.75 km/h) | 77.67 mph (125.01 km/h) |
| 85 mph (136.79 km/h) | 82.53 mph (132.82 km/h) |
| 90 mph (144.84 km/h) | 87.38 mph (140.63 km/h) |
| 95 mph (152.89 km/h) | 92.24 mph (148.44 km/h) |
| 100 mph (160.93 km/h) | 97.09 mph (156.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2168 | 2519 | 2713 | 2833 | 2962 | 3054 | 3156 | 3276 | 3442 | 3608 | 3792 | 3940 | 4208 | 4503 | 4734 | 4881 | 4964 | 5269 | 5693 | 6616 |
Better Fuel Economy Factory Ratios Increased Power
