Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/35-21 | 265/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.58 (725.9) | 29.35 (745.4) | 0.77 (19.5) 2.7% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 89.78 (2280.48) | 92.19 (2341.74) | 2.41 (61.26) 2.7% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.17 (106) | 0.38 (9.75) 10.1% |
| Revolutions per mile (km) | 705.7 (438.5) | 687.24 (427.03) | -18.46 (-11.47) -2.6% |
265/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.54 mph (33.05 km/h) |
| 25 mph (40.23 km/h) | 25.67 mph (41.31 km/h) |
| 30 mph (48.28 km/h) | 30.81 mph (49.58 km/h) |
| 35 mph (56.33 km/h) | 35.94 mph (57.84 km/h) |
| 40 mph (64.37 km/h) | 41.07 mph (66.1 km/h) |
| 45 mph (72.42 km/h) | 46.21 mph (74.37 km/h) |
| 50 mph (80.47 km/h) | 51.34 mph (82.63 km/h) |
| 55 mph (88.51 km/h) | 56.48 mph (90.89 km/h) |
| 60 mph (96.56 km/h) | 61.61 mph (99.15 km/h) |
| 65 mph (104.61 km/h) | 66.75 mph (107.42 km/h) |
| 70 mph (112.65 km/h) | 71.88 mph (115.68 km/h) |
| 75 mph (120.7 km/h) | 77.01 mph (123.94 km/h) |
| 80 mph (128.75 km/h) | 82.15 mph (132.21 km/h) |
| 85 mph (136.79 km/h) | 87.28 mph (140.47 km/h) |
| 90 mph (144.84 km/h) | 92.42 mph (148.73 km/h) |
| 95 mph (152.89 km/h) | 97.55 mph (157 km/h) |
| 100 mph (160.93 km/h) | 102.69 mph (165.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1749 | 2032 | 2188 | 2285 | 2389 | 2463 | 2545 | 2642 | 2776 | 2910 | 3059 | 3178 | 3394 | 3632 | 3818 | 3937 | 4004 | 4249 | 4592 | 5336 |
Better Fuel Economy Factory Ratios Increased Power
