Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-21 | 265/45-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.66 (753.4) | 30.39 (771.9) | 0.73 (18.5) 2.5% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 93.18 (2366.88) | 95.47 (2425) | 2.29 (58.12) 2.5% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.69 (119.25) | 0.36 (9.25) 8.4% |
| Revolutions per mile (km) | 679.94 (422.5) | 663.65 (412.37) | -16.3 (-10.13) -2.4% |
265/45-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.49 mph (32.98 km/h) |
| 25 mph (40.23 km/h) | 25.61 mph (41.22 km/h) |
| 30 mph (48.28 km/h) | 30.74 mph (49.47 km/h) |
| 35 mph (56.33 km/h) | 35.86 mph (57.71 km/h) |
| 40 mph (64.37 km/h) | 40.98 mph (65.95 km/h) |
| 45 mph (72.42 km/h) | 46.1 mph (74.2 km/h) |
| 50 mph (80.47 km/h) | 51.23 mph (82.44 km/h) |
| 55 mph (88.51 km/h) | 56.35 mph (90.69 km/h) |
| 60 mph (96.56 km/h) | 61.47 mph (98.93 km/h) |
| 65 mph (104.61 km/h) | 66.6 mph (107.18 km/h) |
| 70 mph (112.65 km/h) | 71.72 mph (115.42 km/h) |
| 75 mph (120.7 km/h) | 76.84 mph (123.66 km/h) |
| 80 mph (128.75 km/h) | 81.96 mph (131.91 km/h) |
| 85 mph (136.79 km/h) | 87.09 mph (140.15 km/h) |
| 90 mph (144.84 km/h) | 92.21 mph (148.4 km/h) |
| 95 mph (152.89 km/h) | 97.33 mph (156.64 km/h) |
| 100 mph (160.93 km/h) | 102.46 mph (164.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1689 | 1962 | 2113 | 2206 | 2307 | 2379 | 2458 | 2551 | 2681 | 2810 | 2954 | 3069 | 3277 | 3507 | 3687 | 3802 | 3866 | 4104 | 4434 | 5153 |
Better Fuel Economy Factory Ratios Increased Power
