Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/30-21 | 265/25-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.4) | 26.22 (665.9) | -0.57 (-14.5) -2.1% |
| Width inches (mm) | 9.65 (245) | 10.43 (265) | 0.79 (20) 8.2% |
| Circum. inches (mm) | 84.16 (2137.54) | 82.36 (2091.99) | -1.79 (-45.55) -2.1% |
| Sidewall Height inches (mm) | 2.89 (73.5) | 2.61 (66.25) | -0.29 (-7.25) -9.9% |
| Revolutions per mile (km) | 752.9 (467.83) | 769.29 (478.01) | 16.39 (10.19) 2.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.57 mph (31.5 km/h) |
| 25 mph (40.23 km/h) | 24.47 mph (39.38 km/h) |
| 30 mph (48.28 km/h) | 29.36 mph (47.25 km/h) |
| 35 mph (56.33 km/h) | 34.25 mph (55.13 km/h) |
| 40 mph (64.37 km/h) | 39.15 mph (63 km/h) |
| 45 mph (72.42 km/h) | 44.04 mph (70.88 km/h) |
| 50 mph (80.47 km/h) | 48.93 mph (78.75 km/h) |
| 55 mph (88.51 km/h) | 53.83 mph (86.63 km/h) |
| 60 mph (96.56 km/h) | 58.72 mph (94.5 km/h) |
| 65 mph (104.61 km/h) | 63.61 mph (102.38 km/h) |
| 70 mph (112.65 km/h) | 68.51 mph (110.25 km/h) |
| 75 mph (120.7 km/h) | 73.4 mph (118.13 km/h) |
| 80 mph (128.75 km/h) | 78.3 mph (126 km/h) |
| 85 mph (136.79 km/h) | 83.19 mph (133.88 km/h) |
| 90 mph (144.84 km/h) | 88.08 mph (141.75 km/h) |
| 95 mph (152.89 km/h) | 92.98 mph (149.63 km/h) |
| 100 mph (160.93 km/h) | 97.87 mph (157.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1958 | 2274 | 2449 | 2558 | 2674 | 2757 | 2849 | 2957 | 3107 | 3257 | 3424 | 3557 | 3799 | 4065 | 4274 | 4407 | 4482 | 4757 | 5140 | 5973 |
Better Fuel Economy Factory Ratios Increased Power
