Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/35-21 | 265/40-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.3 (718.9) | 29.35 (745.4) | 1.04 (26.5) 3.7% |
| Width inches (mm) | 10.43 (265) | 10.43 (265) | 0 (0) 0% |
| Circum. inches (mm) | 88.92 (2258.49) | 92.19 (2341.74) | 3.28 (83.25) 3.7% |
| Sidewall Height inches (mm) | 3.65 (92.75) | 4.17 (106) | 0.52 (13.25) 14.3% |
| Revolutions per mile (km) | 712.57 (442.77) | 687.24 (427.03) | -25.33 (-15.74) -3.6% |
265/40-21 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.74 mph (33.37 km/h) |
| 25 mph (40.23 km/h) | 25.92 mph (41.72 km/h) |
| 30 mph (48.28 km/h) | 31.11 mph (50.06 km/h) |
| 35 mph (56.33 km/h) | 36.29 mph (58.4 km/h) |
| 40 mph (64.37 km/h) | 41.47 mph (66.75 km/h) |
| 45 mph (72.42 km/h) | 46.66 mph (75.09 km/h) |
| 50 mph (80.47 km/h) | 51.84 mph (83.43 km/h) |
| 55 mph (88.51 km/h) | 57.03 mph (91.78 km/h) |
| 60 mph (96.56 km/h) | 62.21 mph (100.12 km/h) |
| 65 mph (104.61 km/h) | 67.4 mph (108.46 km/h) |
| 70 mph (112.65 km/h) | 72.58 mph (116.81 km/h) |
| 75 mph (120.7 km/h) | 77.76 mph (125.15 km/h) |
| 80 mph (128.75 km/h) | 82.95 mph (133.49 km/h) |
| 85 mph (136.79 km/h) | 88.13 mph (141.84 km/h) |
| 90 mph (144.84 km/h) | 93.32 mph (150.18 km/h) |
| 95 mph (152.89 km/h) | 98.5 mph (158.52 km/h) |
| 100 mph (160.93 km/h) | 103.69 mph (166.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
