Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-21 | 130/60-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.09 (713.4) | 27.14 (689.4) | -0.94 (-24) -3.4% |
| Width inches (mm) | 3.94 (100) | 5.12 (130) | 1.18 (30) 30% |
| Circum. inches (mm) | 88.24 (2241.21) | 85.27 (2165.81) | -2.97 (-75.4) -3.4% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.07 (78) | -0.47 (-12) -13.3% |
| Revolutions per mile (km) | 718.07 (446.19) | 743.07 (461.72) | 25 (15.53) 3.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.33 mph (31.1 km/h) |
| 25 mph (40.23 km/h) | 24.16 mph (38.88 km/h) |
| 30 mph (48.28 km/h) | 28.99 mph (46.66 km/h) |
| 35 mph (56.33 km/h) | 33.82 mph (54.43 km/h) |
| 40 mph (64.37 km/h) | 38.65 mph (62.21 km/h) |
| 45 mph (72.42 km/h) | 43.49 mph (69.98 km/h) |
| 50 mph (80.47 km/h) | 48.32 mph (77.76 km/h) |
| 55 mph (88.51 km/h) | 53.15 mph (85.54 km/h) |
| 60 mph (96.56 km/h) | 57.98 mph (93.31 km/h) |
| 65 mph (104.61 km/h) | 62.81 mph (101.09 km/h) |
| 70 mph (112.65 km/h) | 67.65 mph (108.86 km/h) |
| 75 mph (120.7 km/h) | 72.48 mph (116.64 km/h) |
| 80 mph (128.75 km/h) | 77.31 mph (124.42 km/h) |
| 85 mph (136.79 km/h) | 82.14 mph (132.19 km/h) |
| 90 mph (144.84 km/h) | 86.97 mph (139.97 km/h) |
| 95 mph (152.89 km/h) | 91.8 mph (147.74 km/h) |
| 100 mph (160.93 km/h) | 96.64 mph (155.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1891 | 2197 | 2366 | 2470 | 2583 | 2663 | 2752 | 2857 | 3001 | 3146 | 3307 | 3436 | 3669 | 3927 | 4128 | 4257 | 4329 | 4595 | 4965 | 5769 |
Better Fuel Economy Factory Ratios Increased Power
