Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-21 | 200/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.09 (713.4) | 26.02 (661) | -2.06 (-52.4) -7.3% |
| Width inches (mm) | 3.94 (100) | 7.87 (200) | 3.94 (100) 100% |
| Circum. inches (mm) | 88.24 (2241.21) | 81.76 (2076.59) | -6.48 (-164.62) -7.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 5.51 (140) | 1.97 (50) 55.6% |
| Revolutions per mile (km) | 718.07 (446.19) | 774.99 (481.56) | 56.92 (35.37) 7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.53 mph (29.82 km/h) |
| 25 mph (40.23 km/h) | 23.16 mph (37.28 km/h) |
| 30 mph (48.28 km/h) | 27.8 mph (44.73 km/h) |
| 35 mph (56.33 km/h) | 32.43 mph (52.19 km/h) |
| 40 mph (64.37 km/h) | 37.06 mph (59.65 km/h) |
| 45 mph (72.42 km/h) | 41.69 mph (67.1 km/h) |
| 50 mph (80.47 km/h) | 46.33 mph (74.56 km/h) |
| 55 mph (88.51 km/h) | 50.96 mph (82.01 km/h) |
| 60 mph (96.56 km/h) | 55.59 mph (89.47 km/h) |
| 65 mph (104.61 km/h) | 60.23 mph (96.92 km/h) |
| 70 mph (112.65 km/h) | 64.86 mph (104.38 km/h) |
| 75 mph (120.7 km/h) | 69.49 mph (111.84 km/h) |
| 80 mph (128.75 km/h) | 74.12 mph (119.29 km/h) |
| 85 mph (136.79 km/h) | 78.76 mph (126.75 km/h) |
| 90 mph (144.84 km/h) | 83.39 mph (134.2 km/h) |
| 95 mph (152.89 km/h) | 88.02 mph (141.66 km/h) |
| 100 mph (160.93 km/h) | 92.65 mph (149.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1972 | 2291 | 2467 | 2576 | 2694 | 2778 | 2870 | 2979 | 3130 | 3281 | 3449 | 3584 | 3827 | 4095 | 4305 | 4440 | 4515 | 4792 | 5178 | 6017 |
Better Fuel Economy Factory Ratios Increased Power
