Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-17 | 180/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.8 (629.8) | 26.21 (665.8) | 1.42 (36) 5.7% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 77.9 (1978.58) | 82.35 (2091.67) | 4.45 (113.1) 5.7% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.61 (117) | 0.71 (18) 18.2% |
| Revolutions per mile (km) | 813.39 (505.41) | 769.41 (478.09) | -43.98 (-27.33) -5.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.14 mph (34.03 km/h) |
| 25 mph (40.23 km/h) | 26.43 mph (42.53 km/h) |
| 30 mph (48.28 km/h) | 31.71 mph (51.04 km/h) |
| 35 mph (56.33 km/h) | 37 mph (59.55 km/h) |
| 40 mph (64.37 km/h) | 42.29 mph (68.05 km/h) |
| 45 mph (72.42 km/h) | 47.57 mph (76.56 km/h) |
| 50 mph (80.47 km/h) | 52.86 mph (85.07 km/h) |
| 55 mph (88.51 km/h) | 58.14 mph (93.57 km/h) |
| 60 mph (96.56 km/h) | 63.43 mph (102.08 km/h) |
| 65 mph (104.61 km/h) | 68.72 mph (110.59 km/h) |
| 70 mph (112.65 km/h) | 74 mph (119.09 km/h) |
| 75 mph (120.7 km/h) | 79.29 mph (127.6 km/h) |
| 80 mph (128.75 km/h) | 84.57 mph (136.11 km/h) |
| 85 mph (136.79 km/h) | 89.86 mph (144.61 km/h) |
| 90 mph (144.84 km/h) | 95.14 mph (153.12 km/h) |
| 95 mph (152.89 km/h) | 100.43 mph (161.63 km/h) |
| 100 mph (160.93 km/h) | 105.72 mph (170.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1958 | 2275 | 2450 | 2558 | 2675 | 2758 | 2850 | 2958 | 3108 | 3258 | 3424 | 3558 | 3799 | 4066 | 4274 | 4408 | 4483 | 4757 | 5141 | 5974 |
Better Fuel Economy Factory Ratios Increased Power
