Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-19 | 265/45-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.07 (840.1) | 30.39 (771.9) | -2.69 (-68.2) -8.1% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 103.91 (2639.25) | 95.47 (2425) | -8.44 (-214.26) -8.1% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 4.69 (119.25) | -2.34 (-59.5) -33.3% |
| Revolutions per mile (km) | 609.77 (378.89) | 663.65 (412.37) | 53.88 (33.48) 8.8% |
265/45-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.38 mph (29.57 km/h) |
| 25 mph (40.23 km/h) | 22.97 mph (36.97 km/h) |
| 30 mph (48.28 km/h) | 27.56 mph (44.36 km/h) |
| 35 mph (56.33 km/h) | 32.16 mph (51.75 km/h) |
| 40 mph (64.37 km/h) | 36.75 mph (59.15 km/h) |
| 45 mph (72.42 km/h) | 41.35 mph (66.54 km/h) |
| 50 mph (80.47 km/h) | 45.94 mph (73.93 km/h) |
| 55 mph (88.51 km/h) | 50.54 mph (81.33 km/h) |
| 60 mph (96.56 km/h) | 55.13 mph (88.72 km/h) |
| 65 mph (104.61 km/h) | 59.72 mph (96.12 km/h) |
| 70 mph (112.65 km/h) | 64.32 mph (103.51 km/h) |
| 75 mph (120.7 km/h) | 68.91 mph (110.9 km/h) |
| 80 mph (128.75 km/h) | 73.51 mph (118.3 km/h) |
| 85 mph (136.79 km/h) | 78.1 mph (125.69 km/h) |
| 90 mph (144.84 km/h) | 82.69 mph (133.08 km/h) |
| 95 mph (152.89 km/h) | 87.29 mph (140.48 km/h) |
| 100 mph (160.93 km/h) | 91.88 mph (147.87 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
