Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.04 (712.2) | 29.1 (739.2) | 1.06 (27) 3.8% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 88.09 (2237.44) | 91.43 (2322.27) | 3.34 (84.82) 3.8% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 5.55 (141) | 0.53 (13.5) 10.6% |
| Revolutions per mile (km) | 719.28 (446.94) | 693.01 (430.61) | -26.27 (-16.32) -3.7% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.76 mph (33.41 km/h) |
| 25 mph (40.23 km/h) | 25.95 mph (41.76 km/h) |
| 30 mph (48.28 km/h) | 31.14 mph (50.11 km/h) |
| 35 mph (56.33 km/h) | 36.33 mph (58.46 km/h) |
| 40 mph (64.37 km/h) | 41.52 mph (66.81 km/h) |
| 45 mph (72.42 km/h) | 46.71 mph (75.17 km/h) |
| 50 mph (80.47 km/h) | 51.9 mph (83.52 km/h) |
| 55 mph (88.51 km/h) | 57.09 mph (91.87 km/h) |
| 60 mph (96.56 km/h) | 62.27 mph (100.22 km/h) |
| 65 mph (104.61 km/h) | 67.46 mph (108.57 km/h) |
| 70 mph (112.65 km/h) | 72.65 mph (116.93 km/h) |
| 75 mph (120.7 km/h) | 77.84 mph (125.28 km/h) |
| 80 mph (128.75 km/h) | 83.03 mph (133.63 km/h) |
| 85 mph (136.79 km/h) | 88.22 mph (141.98 km/h) |
| 90 mph (144.84 km/h) | 93.41 mph (150.33 km/h) |
| 95 mph (152.89 km/h) | 98.6 mph (158.68 km/h) |
| 100 mph (160.93 km/h) | 103.79 mph (167.04 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
