Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/30-21 | 265/25-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.26 (692.4) | 26.22 (665.9) | -1.04 (-26.5) -3.8% |
| Width inches (mm) | 10.43 (265) | 10.43 (265) | 0 (0) 0% |
| Circum. inches (mm) | 85.64 (2175.24) | 82.36 (2091.99) | -3.28 (-83.25) -3.8% |
| Sidewall Height inches (mm) | 3.13 (79.5) | 2.61 (66.25) | -0.52 (-13.25) -16.7% |
| Revolutions per mile (km) | 739.85 (459.72) | 769.29 (478.01) | 29.44 (18.29) 4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.96 km/h) |
| 25 mph (40.23 km/h) | 24.04 mph (38.69 km/h) |
| 30 mph (48.28 km/h) | 28.85 mph (46.43 km/h) |
| 35 mph (56.33 km/h) | 33.66 mph (54.17 km/h) |
| 40 mph (64.37 km/h) | 38.47 mph (61.91 km/h) |
| 45 mph (72.42 km/h) | 43.28 mph (69.65 km/h) |
| 50 mph (80.47 km/h) | 48.09 mph (77.39 km/h) |
| 55 mph (88.51 km/h) | 52.9 mph (85.13 km/h) |
| 60 mph (96.56 km/h) | 57.7 mph (92.87 km/h) |
| 65 mph (104.61 km/h) | 62.51 mph (100.6 km/h) |
| 70 mph (112.65 km/h) | 67.32 mph (108.34 km/h) |
| 75 mph (120.7 km/h) | 72.13 mph (116.08 km/h) |
| 80 mph (128.75 km/h) | 76.94 mph (123.82 km/h) |
| 85 mph (136.79 km/h) | 81.75 mph (131.56 km/h) |
| 90 mph (144.84 km/h) | 86.56 mph (139.3 km/h) |
| 95 mph (152.89 km/h) | 91.36 mph (147.04 km/h) |
| 100 mph (160.93 km/h) | 96.17 mph (154.78 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
