Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/66-17 | 31.5/12.5-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.77 (781.6) | 31.52 (800.72) | 0.75 (19.12) 2.4% |
| Width inches (mm) | 10.43 (265) | 12.52 (318) | 2.09 (53) 20% |
| Circum. inches (mm) | 96.67 (2455.47) | 99.04 (2515.54) | 2.36 (60.07) 2.4% |
| Sidewall Height inches (mm) | 6.89 (174.9) | 7.76 (197.16) | 0.88 (22.26) 12.7% |
| Revolutions per mile (km) | 655.41 (407.25) | 639.76 (397.53) | -15.65 (-9.72) -2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.49 mph (32.97 km/h) |
| 25 mph (40.23 km/h) | 25.61 mph (41.22 km/h) |
| 30 mph (48.28 km/h) | 30.73 mph (49.46 km/h) |
| 35 mph (56.33 km/h) | 35.86 mph (57.71 km/h) |
| 40 mph (64.37 km/h) | 40.98 mph (65.95 km/h) |
| 45 mph (72.42 km/h) | 46.1 mph (74.19 km/h) |
| 50 mph (80.47 km/h) | 51.22 mph (82.44 km/h) |
| 55 mph (88.51 km/h) | 56.35 mph (90.68 km/h) |
| 60 mph (96.56 km/h) | 61.47 mph (98.92 km/h) |
| 65 mph (104.61 km/h) | 66.59 mph (107.17 km/h) |
| 70 mph (112.65 km/h) | 71.71 mph (115.41 km/h) |
| 75 mph (120.7 km/h) | 76.83 mph (123.65 km/h) |
| 80 mph (128.75 km/h) | 81.96 mph (131.9 km/h) |
| 85 mph (136.79 km/h) | 87.08 mph (140.14 km/h) |
| 90 mph (144.84 km/h) | 92.2 mph (148.38 km/h) |
| 95 mph (152.89 km/h) | 97.32 mph (156.63 km/h) |
| 100 mph (160.93 km/h) | 102.45 mph (164.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1628 | 1891 | 2037 | 2127 | 2224 | 2293 | 2369 | 2459 | 2584 | 2709 | 2847 | 2958 | 3159 | 3381 | 3554 | 3665 | 3727 | 3956 | 4275 | 4967 |
Better Fuel Economy Factory Ratios Increased Power
