Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 305/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 34.81 (884.2) | 0.79 (19.96) 2.3% |
| Width inches (mm) | 12.52 (318) | 12.01 (305) | -0.51 (-13) -4.1% |
| Circum. inches (mm) | 106.89 (2715.09) | 109.36 (2777.8) | 2.47 (62.71) 2.3% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 8.41 (213.5) | 0.39 (9.98) 4.9% |
| Revolutions per mile (km) | 592.74 (368.31) | 579.36 (360) | -13.38 (-8.31) -2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.46 mph (32.93 km/h) |
| 25 mph (40.23 km/h) | 25.58 mph (41.16 km/h) |
| 30 mph (48.28 km/h) | 30.69 mph (49.4 km/h) |
| 35 mph (56.33 km/h) | 35.81 mph (57.63 km/h) |
| 40 mph (64.37 km/h) | 40.92 mph (65.86 km/h) |
| 45 mph (72.42 km/h) | 46.04 mph (74.09 km/h) |
| 50 mph (80.47 km/h) | 51.15 mph (82.33 km/h) |
| 55 mph (88.51 km/h) | 56.27 mph (90.56 km/h) |
| 60 mph (96.56 km/h) | 61.39 mph (98.79 km/h) |
| 65 mph (104.61 km/h) | 66.5 mph (107.02 km/h) |
| 70 mph (112.65 km/h) | 71.62 mph (115.26 km/h) |
| 75 mph (120.7 km/h) | 76.73 mph (123.49 km/h) |
| 80 mph (128.75 km/h) | 81.85 mph (131.72 km/h) |
| 85 mph (136.79 km/h) | 86.96 mph (139.95 km/h) |
| 90 mph (144.84 km/h) | 92.08 mph (148.19 km/h) |
| 95 mph (152.89 km/h) | 97.19 mph (156.42 km/h) |
| 100 mph (160.93 km/h) | 102.31 mph (164.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1474 | 1713 | 1845 | 1926 | 2014 | 2077 | 2146 | 2227 | 2340 | 2453 | 2579 | 2679 | 2861 | 3062 | 3218 | 3319 | 3375 | 3582 | 3871 | 4498 |
Better Fuel Economy Factory Ratios Increased Power
