Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/90-18 | 90/90-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.21 (691.2) | 27.38 (695.4) | 0.17 (4.2) 0.6% |
| Width inches (mm) | 5.12 (130) | 3.54 (90) | -1.57 (-40) -30.8% |
| Circum. inches (mm) | 85.49 (2171.47) | 86.01 (2184.66) | 0.52 (13.19) 0.6% |
| Sidewall Height inches (mm) | 4.61 (117) | 3.19 (81) | -1.42 (-36) -30.8% |
| Revolutions per mile (km) | 741.13 (460.52) | 736.66 (457.74) | -4.48 (-2.78) -0.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.12 mph (32.38 km/h) |
| 25 mph (40.23 km/h) | 25.15 mph (40.48 km/h) |
| 30 mph (48.28 km/h) | 30.18 mph (48.57 km/h) |
| 35 mph (56.33 km/h) | 35.21 mph (56.67 km/h) |
| 40 mph (64.37 km/h) | 40.24 mph (64.77 km/h) |
| 45 mph (72.42 km/h) | 45.27 mph (72.86 km/h) |
| 50 mph (80.47 km/h) | 50.3 mph (80.96 km/h) |
| 55 mph (88.51 km/h) | 55.33 mph (89.05 km/h) |
| 60 mph (96.56 km/h) | 60.36 mph (97.15 km/h) |
| 65 mph (104.61 km/h) | 65.39 mph (105.24 km/h) |
| 70 mph (112.65 km/h) | 70.43 mph (113.34 km/h) |
| 75 mph (120.7 km/h) | 75.46 mph (121.43 km/h) |
| 80 mph (128.75 km/h) | 80.49 mph (129.53 km/h) |
| 85 mph (136.79 km/h) | 85.52 mph (137.63 km/h) |
| 90 mph (144.84 km/h) | 90.55 mph (145.72 km/h) |
| 95 mph (152.89 km/h) | 95.58 mph (153.82 km/h) |
| 100 mph (160.93 km/h) | 100.61 mph (161.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1875 | 2178 | 2345 | 2449 | 2561 | 2640 | 2728 | 2832 | 2976 | 3119 | 3279 | 3406 | 3638 | 3893 | 4092 | 4220 | 4292 | 4555 | 4922 | 5720 |
Better Fuel Economy Factory Ratios Increased Power
