Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/90-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736.2) | 29.1 (739.2) | 0.12 (3) 0.4% |
| Width inches (mm) | 6.1 (155) | 9.25 (235) | 3.15 (80) 51.6% |
| Circum. inches (mm) | 91.06 (2312.84) | 91.43 (2322.27) | 0.37 (9.42) 0.4% |
| Sidewall Height inches (mm) | 5.49 (139.5) | 5.55 (141) | 0.06 (1.5) 1.1% |
| Revolutions per mile (km) | 695.83 (432.37) | 693.01 (430.61) | -2.82 (-1.75) -0.4% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.08 mph (32.32 km/h) |
| 25 mph (40.23 km/h) | 25.1 mph (40.4 km/h) |
| 30 mph (48.28 km/h) | 30.12 mph (48.48 km/h) |
| 35 mph (56.33 km/h) | 35.14 mph (56.56 km/h) |
| 40 mph (64.37 km/h) | 40.16 mph (64.64 km/h) |
| 45 mph (72.42 km/h) | 45.18 mph (72.72 km/h) |
| 50 mph (80.47 km/h) | 50.2 mph (80.8 km/h) |
| 55 mph (88.51 km/h) | 55.22 mph (88.87 km/h) |
| 60 mph (96.56 km/h) | 60.24 mph (96.95 km/h) |
| 65 mph (104.61 km/h) | 65.26 mph (105.03 km/h) |
| 70 mph (112.65 km/h) | 70.29 mph (113.11 km/h) |
| 75 mph (120.7 km/h) | 75.31 mph (121.19 km/h) |
| 80 mph (128.75 km/h) | 80.33 mph (129.27 km/h) |
| 85 mph (136.79 km/h) | 85.35 mph (137.35 km/h) |
| 90 mph (144.84 km/h) | 90.37 mph (145.43 km/h) |
| 95 mph (152.89 km/h) | 95.39 mph (153.51 km/h) |
| 100 mph (160.93 km/h) | 100.41 mph (161.59 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
