Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-17 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.44 (620.8) | 29.1 (739.2) | 4.66 (118.4) 19.1% |
| Width inches (mm) | 5.31 (135) | 9.25 (235) | 3.94 (100) 74.1% |
| Circum. inches (mm) | 76.78 (1950.3) | 91.43 (2322.27) | 14.64 (371.96) 19.1% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 5.55 (141) | 1.83 (46.5) 49.2% |
| Revolutions per mile (km) | 825.18 (512.74) | 693.01 (430.61) | -132.17 (-82.13) -16% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.81 mph (38.33 km/h) |
| 25 mph (40.23 km/h) | 29.77 mph (47.91 km/h) |
| 30 mph (48.28 km/h) | 35.72 mph (57.49 km/h) |
| 35 mph (56.33 km/h) | 41.68 mph (67.07 km/h) |
| 40 mph (64.37 km/h) | 47.63 mph (76.65 km/h) |
| 45 mph (72.42 km/h) | 53.58 mph (86.23 km/h) |
| 50 mph (80.47 km/h) | 59.54 mph (95.81 km/h) |
| 55 mph (88.51 km/h) | 65.49 mph (105.4 km/h) |
| 60 mph (96.56 km/h) | 71.44 mph (114.98 km/h) |
| 65 mph (104.61 km/h) | 77.4 mph (124.56 km/h) |
| 70 mph (112.65 km/h) | 83.35 mph (134.14 km/h) |
| 75 mph (120.7 km/h) | 89.3 mph (143.72 km/h) |
| 80 mph (128.75 km/h) | 95.26 mph (153.3 km/h) |
| 85 mph (136.79 km/h) | 101.21 mph (162.88 km/h) |
| 90 mph (144.84 km/h) | 107.16 mph (172.47 km/h) |
| 95 mph (152.89 km/h) | 113.12 mph (182.05 km/h) |
| 100 mph (160.93 km/h) | 119.07 mph (191.63 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
