Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-19 | 90/100-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.5 (698.6) | 28.09 (713.4) | 0.58 (14.8) 2.1% |
| Width inches (mm) | 4.72 (120) | 3.54 (90) | -1.18 (-30) -25% |
| Circum. inches (mm) | 86.41 (2194.72) | 88.24 (2241.21) | 1.83 (46.5) 2.1% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.54 (90) | -0.71 (-18) -16.7% |
| Revolutions per mile (km) | 733.28 (455.64) | 718.07 (446.19) | -15.21 (-9.45) -2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.87 km/h) |
| 25 mph (40.23 km/h) | 25.53 mph (41.09 km/h) |
| 30 mph (48.28 km/h) | 30.64 mph (49.3 km/h) |
| 35 mph (56.33 km/h) | 35.74 mph (57.52 km/h) |
| 40 mph (64.37 km/h) | 40.85 mph (65.74 km/h) |
| 45 mph (72.42 km/h) | 45.95 mph (73.95 km/h) |
| 50 mph (80.47 km/h) | 51.06 mph (82.17 km/h) |
| 55 mph (88.51 km/h) | 56.17 mph (90.39 km/h) |
| 60 mph (96.56 km/h) | 61.27 mph (98.61 km/h) |
| 65 mph (104.61 km/h) | 66.38 mph (106.82 km/h) |
| 70 mph (112.65 km/h) | 71.48 mph (115.04 km/h) |
| 75 mph (120.7 km/h) | 76.59 mph (123.26 km/h) |
| 80 mph (128.75 km/h) | 81.69 mph (131.48 km/h) |
| 85 mph (136.79 km/h) | 86.8 mph (139.69 km/h) |
| 90 mph (144.84 km/h) | 91.91 mph (147.91 km/h) |
| 95 mph (152.89 km/h) | 97.01 mph (156.13 km/h) |
| 100 mph (160.93 km/h) | 102.12 mph (164.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1827 | 2123 | 2286 | 2387 | 2496 | 2574 | 2659 | 2760 | 2900 | 3040 | 3196 | 3320 | 3546 | 3795 | 3989 | 4113 | 4183 | 4440 | 4798 | 5575 |
Better Fuel Economy Factory Ratios Increased Power
