Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/65-18 | 305/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.07 (814.7) | 32.61 (828.3) | 0.54 (13.6) 1.7% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 100.77 (2559.46) | 102.45 (2602.18) | 1.68 (42.73) 1.7% |
| Sidewall Height inches (mm) | 7.04 (178.75) | 7.81 (198.25) | 0.77 (19.5) 10.9% |
| Revolutions per mile (km) | 628.78 (390.71) | 618.46 (384.29) | -10.32 (-6.42) -1.6% |
305/65-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.33 mph (32.72 km/h) |
| 25 mph (40.23 km/h) | 25.42 mph (40.91 km/h) |
| 30 mph (48.28 km/h) | 30.5 mph (49.09 km/h) |
| 35 mph (56.33 km/h) | 35.58 mph (57.27 km/h) |
| 40 mph (64.37 km/h) | 40.67 mph (65.45 km/h) |
| 45 mph (72.42 km/h) | 45.75 mph (73.63 km/h) |
| 50 mph (80.47 km/h) | 50.83 mph (81.81 km/h) |
| 55 mph (88.51 km/h) | 55.92 mph (89.99 km/h) |
| 60 mph (96.56 km/h) | 61 mph (98.17 km/h) |
| 65 mph (104.61 km/h) | 66.09 mph (106.35 km/h) |
| 70 mph (112.65 km/h) | 71.17 mph (114.53 km/h) |
| 75 mph (120.7 km/h) | 76.25 mph (122.72 km/h) |
| 80 mph (128.75 km/h) | 81.34 mph (130.9 km/h) |
| 85 mph (136.79 km/h) | 86.42 mph (139.08 km/h) |
| 90 mph (144.84 km/h) | 91.5 mph (147.26 km/h) |
| 95 mph (152.89 km/h) | 96.59 mph (155.44 km/h) |
| 100 mph (160.93 km/h) | 101.67 mph (163.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1574 | 1828 | 1969 | 2056 | 2150 | 2217 | 2290 | 2378 | 2498 | 2619 | 2753 | 2860 | 3054 | 3268 | 3436 | 3543 | 3603 | 3824 | 4132 | 4802 |
Better Fuel Economy Factory Ratios Increased Power
