Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/65-13 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.44 (544.7) | 29.1 (739.2) | 7.66 (194.5) 35.7% |
| Width inches (mm) | 6.5 (165) | 9.25 (235) | 2.76 (70) 42.4% |
| Circum. inches (mm) | 67.37 (1711.23) | 91.43 (2322.27) | 24.06 (611.04) 35.7% |
| Sidewall Height inches (mm) | 4.22 (107.25) | 5.55 (141) | 1.33 (33.75) 31.5% |
| Revolutions per mile (km) | 940.46 (584.38) | 693.01 (430.61) | -247.46 (-153.76) -26.3% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.14 mph (43.68 km/h) |
| 25 mph (40.23 km/h) | 33.93 mph (54.6 km/h) |
| 30 mph (48.28 km/h) | 40.71 mph (65.52 km/h) |
| 35 mph (56.33 km/h) | 47.5 mph (76.44 km/h) |
| 40 mph (64.37 km/h) | 54.28 mph (87.36 km/h) |
| 45 mph (72.42 km/h) | 61.07 mph (98.28 km/h) |
| 50 mph (80.47 km/h) | 67.85 mph (109.2 km/h) |
| 55 mph (88.51 km/h) | 74.64 mph (120.12 km/h) |
| 60 mph (96.56 km/h) | 81.42 mph (131.04 km/h) |
| 65 mph (104.61 km/h) | 88.21 mph (141.96 km/h) |
| 70 mph (112.65 km/h) | 95 mph (152.88 km/h) |
| 75 mph (120.7 km/h) | 101.78 mph (163.8 km/h) |
| 80 mph (128.75 km/h) | 108.57 mph (174.72 km/h) |
| 85 mph (136.79 km/h) | 115.35 mph (185.64 km/h) |
| 90 mph (144.84 km/h) | 122.14 mph (196.56 km/h) |
| 95 mph (152.89 km/h) | 128.92 mph (207.48 km/h) |
| 100 mph (160.93 km/h) | 135.71 mph (218.4 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
