Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-21 | 265/45-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.74 (780.9) | 30.39 (771.9) | -0.35 (-9) -1.2% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 96.59 (2453.27) | 95.47 (2425) | -1.11 (-28.27) -1.2% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.69 (119.25) | -0.18 (-4.5) -3.6% |
| Revolutions per mile (km) | 656 (407.62) | 663.65 (412.37) | 7.65 (4.75) 1.2% |
265/45-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.82 km/h) |
| 25 mph (40.23 km/h) | 24.71 mph (39.77 km/h) |
| 30 mph (48.28 km/h) | 29.65 mph (47.72 km/h) |
| 35 mph (56.33 km/h) | 34.6 mph (55.68 km/h) |
| 40 mph (64.37 km/h) | 39.54 mph (63.63 km/h) |
| 45 mph (72.42 km/h) | 44.48 mph (71.59 km/h) |
| 50 mph (80.47 km/h) | 49.42 mph (79.54 km/h) |
| 55 mph (88.51 km/h) | 54.37 mph (87.49 km/h) |
| 60 mph (96.56 km/h) | 59.31 mph (95.45 km/h) |
| 65 mph (104.61 km/h) | 64.25 mph (103.4 km/h) |
| 70 mph (112.65 km/h) | 69.19 mph (111.36 km/h) |
| 75 mph (120.7 km/h) | 74.14 mph (119.31 km/h) |
| 80 mph (128.75 km/h) | 79.08 mph (127.26 km/h) |
| 85 mph (136.79 km/h) | 84.02 mph (135.22 km/h) |
| 90 mph (144.84 km/h) | 88.96 mph (143.17 km/h) |
| 95 mph (152.89 km/h) | 93.91 mph (151.13 km/h) |
| 100 mph (160.93 km/h) | 98.85 mph (159.08 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
