Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-23 | 275/55-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.41 (797.7) | 32.91 (835.9) | 1.5 (38.2) 4.8% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 98.66 (2506.05) | 103.39 (2626.06) | 4.72 (120.01) 4.8% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 5.95 (151.25) | 1.75 (44.5) 41.7% |
| Revolutions per mile (km) | 642.18 (399.03) | 612.84 (380.8) | -29.35 (-18.24) -4.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.96 mph (33.73 km/h) |
| 25 mph (40.23 km/h) | 26.2 mph (42.16 km/h) |
| 30 mph (48.28 km/h) | 31.44 mph (50.59 km/h) |
| 35 mph (56.33 km/h) | 36.68 mph (59.02 km/h) |
| 40 mph (64.37 km/h) | 41.92 mph (67.46 km/h) |
| 45 mph (72.42 km/h) | 47.15 mph (75.89 km/h) |
| 50 mph (80.47 km/h) | 52.39 mph (84.32 km/h) |
| 55 mph (88.51 km/h) | 57.63 mph (92.75 km/h) |
| 60 mph (96.56 km/h) | 62.87 mph (101.18 km/h) |
| 65 mph (104.61 km/h) | 68.11 mph (109.62 km/h) |
| 70 mph (112.65 km/h) | 73.35 mph (118.05 km/h) |
| 75 mph (120.7 km/h) | 78.59 mph (126.48 km/h) |
| 80 mph (128.75 km/h) | 83.83 mph (134.91 km/h) |
| 85 mph (136.79 km/h) | 89.07 mph (143.35 km/h) |
| 90 mph (144.84 km/h) | 94.31 mph (151.78 km/h) |
| 95 mph (152.89 km/h) | 99.55 mph (160.21 km/h) |
| 100 mph (160.93 km/h) | 104.79 mph (168.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1560 | 1812 | 1951 | 2037 | 2130 | 2197 | 2270 | 2356 | 2475 | 2595 | 2728 | 2834 | 3026 | 3239 | 3404 | 3511 | 3570 | 3789 | 4095 | 4758 |
Better Fuel Economy Factory Ratios Increased Power
