Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/90-17 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.57 (674.8) | 29.1 (739.2) | 2.54 (64.4) 9.5% |
| Width inches (mm) | 5.31 (135) | 9.25 (235) | 3.94 (100) 74.1% |
| Circum. inches (mm) | 83.46 (2119.95) | 91.43 (2322.27) | 7.97 (202.32) 9.5% |
| Sidewall Height inches (mm) | 4.78 (121.5) | 5.55 (141) | 0.77 (19.5) 16% |
| Revolutions per mile (km) | 759.14 (471.71) | 693.01 (430.61) | -66.14 (-41.1) -8.7% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.91 mph (35.26 km/h) |
| 25 mph (40.23 km/h) | 27.39 mph (44.07 km/h) |
| 30 mph (48.28 km/h) | 32.86 mph (52.89 km/h) |
| 35 mph (56.33 km/h) | 38.34 mph (61.7 km/h) |
| 40 mph (64.37 km/h) | 43.82 mph (70.52 km/h) |
| 45 mph (72.42 km/h) | 49.29 mph (79.33 km/h) |
| 50 mph (80.47 km/h) | 54.77 mph (88.15 km/h) |
| 55 mph (88.51 km/h) | 60.25 mph (96.96 km/h) |
| 60 mph (96.56 km/h) | 65.73 mph (105.78 km/h) |
| 65 mph (104.61 km/h) | 71.2 mph (114.59 km/h) |
| 70 mph (112.65 km/h) | 76.68 mph (123.41 km/h) |
| 75 mph (120.7 km/h) | 82.16 mph (132.22 km/h) |
| 80 mph (128.75 km/h) | 87.63 mph (141.03 km/h) |
| 85 mph (136.79 km/h) | 93.11 mph (149.85 km/h) |
| 90 mph (144.84 km/h) | 98.59 mph (158.66 km/h) |
| 95 mph (152.89 km/h) | 104.07 mph (167.48 km/h) |
| 100 mph (160.93 km/h) | 109.54 mph (176.29 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
