Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-18 | 305/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.41 (670.7) | 25.2 (640.2) | -1.2 (-30.5) -4.5% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 82.96 (2107.07) | 79.18 (2011.25) | -3.77 (-95.82) -4.5% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 3.6 (91.5) | -0.6 (-15.25) -14.3% |
| Revolutions per mile (km) | 763.78 (474.59) | 800.17 (497.2) | 36.39 (22.61) 4.8% |
305/30-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.09 mph (30.72 km/h) |
| 25 mph (40.23 km/h) | 23.86 mph (38.4 km/h) |
| 30 mph (48.28 km/h) | 28.64 mph (46.08 km/h) |
| 35 mph (56.33 km/h) | 33.41 mph (53.77 km/h) |
| 40 mph (64.37 km/h) | 38.18 mph (61.45 km/h) |
| 45 mph (72.42 km/h) | 42.95 mph (69.13 km/h) |
| 50 mph (80.47 km/h) | 47.73 mph (76.81 km/h) |
| 55 mph (88.51 km/h) | 52.5 mph (84.49 km/h) |
| 60 mph (96.56 km/h) | 57.27 mph (92.17 km/h) |
| 65 mph (104.61 km/h) | 62.04 mph (99.85 km/h) |
| 70 mph (112.65 km/h) | 66.82 mph (107.53 km/h) |
| 75 mph (120.7 km/h) | 71.59 mph (115.21 km/h) |
| 80 mph (128.75 km/h) | 76.36 mph (122.89 km/h) |
| 85 mph (136.79 km/h) | 81.13 mph (130.57 km/h) |
| 90 mph (144.84 km/h) | 85.91 mph (138.25 km/h) |
| 95 mph (152.89 km/h) | 90.68 mph (145.94 km/h) |
| 100 mph (160.93 km/h) | 95.45 mph (153.62 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2036 | 2366 | 2548 | 2660 | 2781 | 2868 | 2963 | 3076 | 3232 | 3388 | 3561 | 3700 | 3951 | 4229 | 4445 | 4584 | 4662 | 4948 | 5346 | 6213 |
Better Fuel Economy Factory Ratios Increased Power
