Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/35-15 | 345/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.51 (622.5) | 26.15 (664.2) | 1.64 (41.7) 6.7% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 76.99 (1955.64) | 82.15 (2086.65) | 5.16 (131) 6.7% |
| Sidewall Height inches (mm) | 4.75 (120.75) | 4.07 (103.5) | -0.68 (-17.25) -14.3% |
| Revolutions per mile (km) | 822.92 (511.34) | 771.26 (479.24) | -51.67 (-32.1) -6.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.34 mph (34.34 km/h) |
| 25 mph (40.23 km/h) | 26.67 mph (42.93 km/h) |
| 30 mph (48.28 km/h) | 32.01 mph (51.51 km/h) |
| 35 mph (56.33 km/h) | 37.34 mph (60.1 km/h) |
| 40 mph (64.37 km/h) | 42.68 mph (68.69 km/h) |
| 45 mph (72.42 km/h) | 48.01 mph (77.27 km/h) |
| 50 mph (80.47 km/h) | 53.35 mph (85.86 km/h) |
| 55 mph (88.51 km/h) | 58.68 mph (94.44 km/h) |
| 60 mph (96.56 km/h) | 64.02 mph (103.03 km/h) |
| 65 mph (104.61 km/h) | 69.35 mph (111.62 km/h) |
| 70 mph (112.65 km/h) | 74.69 mph (120.2 km/h) |
| 75 mph (120.7 km/h) | 80.02 mph (128.79 km/h) |
| 80 mph (128.75 km/h) | 85.36 mph (137.37 km/h) |
| 85 mph (136.79 km/h) | 90.69 mph (145.96 km/h) |
| 90 mph (144.84 km/h) | 96.03 mph (154.54 km/h) |
| 95 mph (152.89 km/h) | 101.36 mph (163.13 km/h) |
| 100 mph (160.93 km/h) | 106.7 mph (171.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1963 | 2280 | 2455 | 2564 | 2681 | 2764 | 2856 | 2965 | 3115 | 3266 | 3433 | 3566 | 3808 | 4076 | 4285 | 4418 | 4493 | 4769 | 5153 | 5988 |
Better Fuel Economy Factory Ratios Increased Power
