Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 29.1 (739.2) | -1.3 (-33) -4.3% |
| Width inches (mm) | 6.89 (175) | 9.25 (235) | 2.36 (60) 34.3% |
| Circum. inches (mm) | 95.51 (2425.94) | 91.43 (2322.27) | -4.08 (-103.67) -4.3% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 5.55 (141) | -0.65 (-16.5) -10.5% |
| Revolutions per mile (km) | 663.39 (412.21) | 693.01 (430.61) | 29.62 (18.4) 4.5% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.15 mph (30.81 km/h) |
| 25 mph (40.23 km/h) | 23.93 mph (38.51 km/h) |
| 30 mph (48.28 km/h) | 28.72 mph (46.22 km/h) |
| 35 mph (56.33 km/h) | 33.5 mph (53.92 km/h) |
| 40 mph (64.37 km/h) | 38.29 mph (61.62 km/h) |
| 45 mph (72.42 km/h) | 43.08 mph (69.33 km/h) |
| 50 mph (80.47 km/h) | 47.86 mph (77.03 km/h) |
| 55 mph (88.51 km/h) | 52.65 mph (84.73 km/h) |
| 60 mph (96.56 km/h) | 57.44 mph (92.43 km/h) |
| 65 mph (104.61 km/h) | 62.22 mph (100.14 km/h) |
| 70 mph (112.65 km/h) | 67.01 mph (107.84 km/h) |
| 75 mph (120.7 km/h) | 71.79 mph (115.54 km/h) |
| 80 mph (128.75 km/h) | 76.58 mph (123.25 km/h) |
| 85 mph (136.79 km/h) | 81.37 mph (130.95 km/h) |
| 90 mph (144.84 km/h) | 86.15 mph (138.65 km/h) |
| 95 mph (152.89 km/h) | 90.94 mph (146.35 km/h) |
| 100 mph (160.93 km/h) | 95.73 mph (154.06 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
