Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 29.1 (739.2) | 5.55 (141) 23.6% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 73.99 (1879.3) | 91.43 (2322.27) | 17.44 (442.96) 23.6% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 5.55 (141) | 2.78 (70.5) 100% |
| Revolutions per mile (km) | 856.35 (532.11) | 693.01 (430.61) | -163.35 (-101.5) -19.1% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.71 mph (39.77 km/h) |
| 25 mph (40.23 km/h) | 30.89 mph (49.72 km/h) |
| 30 mph (48.28 km/h) | 37.07 mph (59.66 km/h) |
| 35 mph (56.33 km/h) | 43.25 mph (69.6 km/h) |
| 40 mph (64.37 km/h) | 49.43 mph (79.55 km/h) |
| 45 mph (72.42 km/h) | 55.61 mph (89.49 km/h) |
| 50 mph (80.47 km/h) | 61.79 mph (99.43 km/h) |
| 55 mph (88.51 km/h) | 67.96 mph (109.38 km/h) |
| 60 mph (96.56 km/h) | 74.14 mph (119.32 km/h) |
| 65 mph (104.61 km/h) | 80.32 mph (129.26 km/h) |
| 70 mph (112.65 km/h) | 86.5 mph (139.21 km/h) |
| 75 mph (120.7 km/h) | 92.68 mph (149.15 km/h) |
| 80 mph (128.75 km/h) | 98.86 mph (159.09 km/h) |
| 85 mph (136.79 km/h) | 105.04 mph (169.04 km/h) |
| 90 mph (144.84 km/h) | 111.21 mph (178.98 km/h) |
| 95 mph (152.89 km/h) | 117.39 mph (188.92 km/h) |
| 100 mph (160.93 km/h) | 123.57 mph (198.87 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1764 | 2049 | 2206 | 2304 | 2409 | 2484 | 2567 | 2664 | 2799 | 2934 | 3084 | 3204 | 3422 | 3662 | 3850 | 3970 | 4037 | 4285 | 4630 | 5381 |
Better Fuel Economy Factory Ratios Increased Power
