Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 29.1 (739.2) | 3.11 (79) 12% |
| Width inches (mm) | 5.71 (145) | 9.25 (235) | 3.54 (90) 62.1% |
| Circum. inches (mm) | 81.66 (2074.08) | 91.43 (2322.27) | 9.77 (248.19) 12% |
| Sidewall Height inches (mm) | 4 (101.5) | 5.55 (141) | 1.56 (39.5) 38.9% |
| Revolutions per mile (km) | 775.93 (482.14) | 693.01 (430.61) | -82.93 (-51.53) -10.7% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.39 mph (36.04 km/h) |
| 25 mph (40.23 km/h) | 27.99 mph (45.05 km/h) |
| 30 mph (48.28 km/h) | 33.59 mph (54.06 km/h) |
| 35 mph (56.33 km/h) | 39.19 mph (63.07 km/h) |
| 40 mph (64.37 km/h) | 44.79 mph (72.08 km/h) |
| 45 mph (72.42 km/h) | 50.38 mph (81.09 km/h) |
| 50 mph (80.47 km/h) | 55.98 mph (90.1 km/h) |
| 55 mph (88.51 km/h) | 61.58 mph (99.11 km/h) |
| 60 mph (96.56 km/h) | 67.18 mph (108.12 km/h) |
| 65 mph (104.61 km/h) | 72.78 mph (117.12 km/h) |
| 70 mph (112.65 km/h) | 78.38 mph (126.13 km/h) |
| 75 mph (120.7 km/h) | 83.97 mph (135.14 km/h) |
| 80 mph (128.75 km/h) | 89.57 mph (144.15 km/h) |
| 85 mph (136.79 km/h) | 95.17 mph (153.16 km/h) |
| 90 mph (144.84 km/h) | 100.77 mph (162.17 km/h) |
| 95 mph (152.89 km/h) | 106.37 mph (171.18 km/h) |
| 100 mph (160.93 km/h) | 111.97 mph (180.19 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
