Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-18 | 305/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.91 (759.7) | 31.21 (792.7) | 1.3 (33) 4.3% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 93.96 (2386.67) | 98.04 (2490.34) | 4.08 (103.67) 4.3% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 6.6 (167.75) | 0.65 (16.5) 10.9% |
| Revolutions per mile (km) | 674.31 (418.99) | 646.23 (401.55) | -28.07 (-17.44) -4.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.87 mph (33.59 km/h) |
| 25 mph (40.23 km/h) | 26.09 mph (41.98 km/h) |
| 30 mph (48.28 km/h) | 31.3 mph (50.38 km/h) |
| 35 mph (56.33 km/h) | 36.52 mph (58.77 km/h) |
| 40 mph (64.37 km/h) | 41.74 mph (67.17 km/h) |
| 45 mph (72.42 km/h) | 46.95 mph (75.57 km/h) |
| 50 mph (80.47 km/h) | 52.17 mph (83.96 km/h) |
| 55 mph (88.51 km/h) | 57.39 mph (92.36 km/h) |
| 60 mph (96.56 km/h) | 62.61 mph (100.76 km/h) |
| 65 mph (104.61 km/h) | 67.82 mph (109.15 km/h) |
| 70 mph (112.65 km/h) | 73.04 mph (117.55 km/h) |
| 75 mph (120.7 km/h) | 78.26 mph (125.94 km/h) |
| 80 mph (128.75 km/h) | 83.48 mph (134.34 km/h) |
| 85 mph (136.79 km/h) | 88.69 mph (142.74 km/h) |
| 90 mph (144.84 km/h) | 93.91 mph (151.13 km/h) |
| 95 mph (152.89 km/h) | 99.13 mph (159.53 km/h) |
| 100 mph (160.93 km/h) | 104.34 mph (167.93 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1645 | 1910 | 2057 | 2148 | 2246 | 2316 | 2393 | 2484 | 2610 | 2736 | 2876 | 2988 | 3191 | 3415 | 3590 | 3702 | 3765 | 3996 | 4318 | 5018 |
Better Fuel Economy Factory Ratios Increased Power
