Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/25-20 | 29.5/11.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.5) | 29.49 (748.92) | 2.69 (68.42) 10.1% |
| Width inches (mm) | 13.58 (345) | 11.5 (292) | -2.09 (-53) -15.4% |
| Circum. inches (mm) | 84.17 (2137.85) | 92.63 (2352.8) | 8.46 (214.95) 10.1% |
| Sidewall Height inches (mm) | 3.4 (86.25) | 7.24 (183.96) | 3.85 (97.71) 113.3% |
| Revolutions per mile (km) | 752.78 (467.76) | 684.01 (425.02) | -68.77 (-42.73) -9.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.01 mph (35.42 km/h) |
| 25 mph (40.23 km/h) | 27.51 mph (44.28 km/h) |
| 30 mph (48.28 km/h) | 33.02 mph (53.13 km/h) |
| 35 mph (56.33 km/h) | 38.52 mph (61.99 km/h) |
| 40 mph (64.37 km/h) | 44.02 mph (70.85 km/h) |
| 45 mph (72.42 km/h) | 49.52 mph (79.7 km/h) |
| 50 mph (80.47 km/h) | 55.03 mph (88.56 km/h) |
| 55 mph (88.51 km/h) | 60.53 mph (97.41 km/h) |
| 60 mph (96.56 km/h) | 66.03 mph (106.27 km/h) |
| 65 mph (104.61 km/h) | 71.54 mph (115.13 km/h) |
| 70 mph (112.65 km/h) | 77.04 mph (123.98 km/h) |
| 75 mph (120.7 km/h) | 82.54 mph (132.84 km/h) |
| 80 mph (128.75 km/h) | 88.04 mph (141.69 km/h) |
| 85 mph (136.79 km/h) | 93.55 mph (150.55 km/h) |
| 90 mph (144.84 km/h) | 99.05 mph (159.4 km/h) |
| 95 mph (152.89 km/h) | 104.55 mph (168.26 km/h) |
| 100 mph (160.93 km/h) | 110.05 mph (177.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1741 | 2022 | 2178 | 2274 | 2378 | 2452 | 2533 | 2630 | 2763 | 2896 | 3044 | 3163 | 3378 | 3615 | 3800 | 3918 | 3985 | 4229 | 4570 | 5311 |
Better Fuel Economy Factory Ratios Increased Power
