Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 130/60-21 | 100/90-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.14 (689.4) | 28.09 (713.4) | 0.94 (24) 3.5% |
| Width inches (mm) | 5.12 (130) | 3.94 (100) | -1.18 (-30) -23.1% |
| Circum. inches (mm) | 85.27 (2165.81) | 88.24 (2241.21) | 2.97 (75.4) 3.5% |
| Sidewall Height inches (mm) | 3.07 (78) | 3.54 (90) | 0.47 (12) 15.4% |
| Revolutions per mile (km) | 743.07 (461.72) | 718.07 (446.19) | -25 (-15.53) -3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.31 km/h) |
| 25 mph (40.23 km/h) | 25.87 mph (41.63 km/h) |
| 30 mph (48.28 km/h) | 31.04 mph (49.96 km/h) |
| 35 mph (56.33 km/h) | 36.22 mph (58.29 km/h) |
| 40 mph (64.37 km/h) | 41.39 mph (66.61 km/h) |
| 45 mph (72.42 km/h) | 46.57 mph (74.94 km/h) |
| 50 mph (80.47 km/h) | 51.74 mph (83.27 km/h) |
| 55 mph (88.51 km/h) | 56.91 mph (91.6 km/h) |
| 60 mph (96.56 km/h) | 62.09 mph (99.92 km/h) |
| 65 mph (104.61 km/h) | 67.26 mph (108.25 km/h) |
| 70 mph (112.65 km/h) | 72.44 mph (116.58 km/h) |
| 75 mph (120.7 km/h) | 77.61 mph (124.9 km/h) |
| 80 mph (128.75 km/h) | 82.79 mph (133.23 km/h) |
| 85 mph (136.79 km/h) | 87.96 mph (141.56 km/h) |
| 90 mph (144.84 km/h) | 93.13 mph (149.88 km/h) |
| 95 mph (152.89 km/h) | 98.31 mph (158.21 km/h) |
| 100 mph (160.93 km/h) | 103.48 mph (166.54 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
