Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-20 | 265/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.72 (704) | 28.35 (720) | 0.63 (16) 2.3% |
| Width inches (mm) | 9.65 (245) | 10.43 (265) | 0.79 (20) 8.2% |
| Circum. inches (mm) | 87.07 (2211.68) | 89.05 (2261.95) | 1.98 (50.27) 2.3% |
| Sidewall Height inches (mm) | 3.86 (98) | 4.17 (106) | 0.31 (8) 8.2% |
| Revolutions per mile (km) | 727.66 (452.14) | 711.49 (442.1) | -16.17 (-10.05) -2.2% |
265/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.92 km/h) |
| 25 mph (40.23 km/h) | 25.57 mph (41.15 km/h) |
| 30 mph (48.28 km/h) | 30.68 mph (49.38 km/h) |
| 35 mph (56.33 km/h) | 35.8 mph (57.61 km/h) |
| 40 mph (64.37 km/h) | 40.91 mph (65.84 km/h) |
| 45 mph (72.42 km/h) | 46.02 mph (74.07 km/h) |
| 50 mph (80.47 km/h) | 51.14 mph (82.3 km/h) |
| 55 mph (88.51 km/h) | 56.25 mph (90.53 km/h) |
| 60 mph (96.56 km/h) | 61.36 mph (98.76 km/h) |
| 65 mph (104.61 km/h) | 66.48 mph (106.99 km/h) |
| 70 mph (112.65 km/h) | 71.59 mph (115.21 km/h) |
| 75 mph (120.7 km/h) | 76.7 mph (123.44 km/h) |
| 80 mph (128.75 km/h) | 81.82 mph (131.67 km/h) |
| 85 mph (136.79 km/h) | 86.93 mph (139.9 km/h) |
| 90 mph (144.84 km/h) | 92.05 mph (148.13 km/h) |
| 95 mph (152.89 km/h) | 97.16 mph (156.36 km/h) |
| 100 mph (160.93 km/h) | 102.27 mph (164.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1811 | 2103 | 2265 | 2365 | 2473 | 2550 | 2635 | 2735 | 2874 | 3013 | 3167 | 3290 | 3513 | 3760 | 3952 | 4076 | 4145 | 4399 | 4754 | 5524 |
Better Fuel Economy Factory Ratios Increased Power
