Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-20 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.25 (743) | 29.1 (739.2) | -0.15 (-3.8) -0.5% |
| Width inches (mm) | 9.25 (235) | 9.25 (235) | 0 (0) 0% |
| Circum. inches (mm) | 91.9 (2334.2) | 91.43 (2322.27) | -0.47 (-11.94) -0.5% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 5.55 (141) | 0.93 (23.5) 20% |
| Revolutions per mile (km) | 689.46 (428.41) | 693.01 (430.61) | 3.54 (2.2) 0.5% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.9 mph (32.02 km/h) |
| 25 mph (40.23 km/h) | 24.87 mph (40.03 km/h) |
| 30 mph (48.28 km/h) | 29.85 mph (48.03 km/h) |
| 35 mph (56.33 km/h) | 34.82 mph (56.04 km/h) |
| 40 mph (64.37 km/h) | 39.8 mph (64.04 km/h) |
| 45 mph (72.42 km/h) | 44.77 mph (72.05 km/h) |
| 50 mph (80.47 km/h) | 49.74 mph (80.06 km/h) |
| 55 mph (88.51 km/h) | 54.72 mph (88.06 km/h) |
| 60 mph (96.56 km/h) | 59.69 mph (96.07 km/h) |
| 65 mph (104.61 km/h) | 64.67 mph (104.07 km/h) |
| 70 mph (112.65 km/h) | 69.64 mph (112.08 km/h) |
| 75 mph (120.7 km/h) | 74.62 mph (120.08 km/h) |
| 80 mph (128.75 km/h) | 79.59 mph (128.09 km/h) |
| 85 mph (136.79 km/h) | 84.57 mph (136.09 km/h) |
| 90 mph (144.84 km/h) | 89.54 mph (144.1 km/h) |
| 95 mph (152.89 km/h) | 94.51 mph (152.11 km/h) |
| 100 mph (160.93 km/h) | 99.49 mph (160.11 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
