Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-21 | 265/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.91 (835.9) | 31.56 (801.7) | -1.35 (-34.2) -4.1% |
| Width inches (mm) | 10.83 (275) | 10.43 (265) | -0.39 (-10) -3.6% |
| Circum. inches (mm) | 103.39 (2626.06) | 99.16 (2518.61) | -4.23 (-107.44) -4.1% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 6.78 (172.25) | 0.83 (21) 13.9% |
| Revolutions per mile (km) | 612.84 (380.8) | 638.98 (397.04) | 26.14 (16.24) 4.3% |
265/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.18 mph (30.87 km/h) |
| 25 mph (40.23 km/h) | 23.98 mph (38.59 km/h) |
| 30 mph (48.28 km/h) | 28.77 mph (46.31 km/h) |
| 35 mph (56.33 km/h) | 33.57 mph (54.02 km/h) |
| 40 mph (64.37 km/h) | 38.36 mph (61.74 km/h) |
| 45 mph (72.42 km/h) | 43.16 mph (69.46 km/h) |
| 50 mph (80.47 km/h) | 47.95 mph (77.18 km/h) |
| 55 mph (88.51 km/h) | 52.75 mph (84.89 km/h) |
| 60 mph (96.56 km/h) | 57.55 mph (92.61 km/h) |
| 65 mph (104.61 km/h) | 62.34 mph (100.33 km/h) |
| 70 mph (112.65 km/h) | 67.14 mph (108.05 km/h) |
| 75 mph (120.7 km/h) | 71.93 mph (115.76 km/h) |
| 80 mph (128.75 km/h) | 76.73 mph (123.48 km/h) |
| 85 mph (136.79 km/h) | 81.52 mph (131.2 km/h) |
| 90 mph (144.84 km/h) | 86.32 mph (138.92 km/h) |
| 95 mph (152.89 km/h) | 91.11 mph (146.63 km/h) |
| 100 mph (160.93 km/h) | 95.91 mph (154.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1626 | 1889 | 2034 | 2124 | 2221 | 2290 | 2366 | 2456 | 2581 | 2706 | 2844 | 2955 | 3155 | 3377 | 3550 | 3660 | 3723 | 3951 | 4269 | 4961 |
Better Fuel Economy Factory Ratios Increased Power
