Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/45-20 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.33 (719.5) | 29.1 (739.2) | 0.78 (19.7) 2.7% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 88.99 (2260.38) | 91.43 (2322.27) | 2.44 (61.89) 2.7% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 5.55 (141) | 1.39 (35.25) 33.3% |
| Revolutions per mile (km) | 711.98 (442.4) | 693.01 (430.61) | -18.97 (-11.79) -2.7% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.55 mph (33.07 km/h) |
| 25 mph (40.23 km/h) | 25.68 mph (41.34 km/h) |
| 30 mph (48.28 km/h) | 30.82 mph (49.6 km/h) |
| 35 mph (56.33 km/h) | 35.96 mph (57.87 km/h) |
| 40 mph (64.37 km/h) | 41.1 mph (66.14 km/h) |
| 45 mph (72.42 km/h) | 46.23 mph (74.4 km/h) |
| 50 mph (80.47 km/h) | 51.37 mph (82.67 km/h) |
| 55 mph (88.51 km/h) | 56.51 mph (90.94 km/h) |
| 60 mph (96.56 km/h) | 61.64 mph (99.2 km/h) |
| 65 mph (104.61 km/h) | 66.78 mph (107.47 km/h) |
| 70 mph (112.65 km/h) | 71.92 mph (115.74 km/h) |
| 75 mph (120.7 km/h) | 77.05 mph (124.01 km/h) |
| 80 mph (128.75 km/h) | 82.19 mph (132.27 km/h) |
| 85 mph (136.79 km/h) | 87.33 mph (140.54 km/h) |
| 90 mph (144.84 km/h) | 92.46 mph (148.81 km/h) |
| 95 mph (152.89 km/h) | 97.6 mph (157.07 km/h) |
| 100 mph (160.93 km/h) | 102.74 mph (165.34 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
