Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.89 (632.2) | 29.1 (739.2) | 4.21 (107) 16.9% |
| Width inches (mm) | 4.92 (125) | 9.25 (235) | 4.33 (110) 88% |
| Circum. inches (mm) | 78.19 (1986.11) | 91.43 (2322.27) | 13.23 (336.15) 16.9% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 5.55 (141) | 2.11 (53.5) 61.1% |
| Revolutions per mile (km) | 810.3 (503.49) | 693.01 (430.61) | -117.29 (-72.88) -14.5% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.39 mph (37.63 km/h) |
| 25 mph (40.23 km/h) | 29.23 mph (47.04 km/h) |
| 30 mph (48.28 km/h) | 35.08 mph (56.45 km/h) |
| 35 mph (56.33 km/h) | 40.92 mph (65.86 km/h) |
| 40 mph (64.37 km/h) | 46.77 mph (75.27 km/h) |
| 45 mph (72.42 km/h) | 52.62 mph (84.68 km/h) |
| 50 mph (80.47 km/h) | 58.46 mph (94.09 km/h) |
| 55 mph (88.51 km/h) | 64.31 mph (103.5 km/h) |
| 60 mph (96.56 km/h) | 70.16 mph (112.9 km/h) |
| 65 mph (104.61 km/h) | 76 mph (122.31 km/h) |
| 70 mph (112.65 km/h) | 81.85 mph (131.72 km/h) |
| 75 mph (120.7 km/h) | 87.69 mph (141.13 km/h) |
| 80 mph (128.75 km/h) | 93.54 mph (150.54 km/h) |
| 85 mph (136.79 km/h) | 99.39 mph (159.95 km/h) |
| 90 mph (144.84 km/h) | 105.23 mph (169.36 km/h) |
| 95 mph (152.89 km/h) | 111.08 mph (178.76 km/h) |
| 100 mph (160.93 km/h) | 116.93 mph (188.17 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
