Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-20 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 29.1 (739.2) | 0.42 (10.7) 1.5% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 90.1 (2288.65) | 91.43 (2322.27) | 1.32 (33.62) 1.5% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.55 (141) | 1.21 (30.75) 27.9% |
| Revolutions per mile (km) | 703.18 (436.94) | 693.01 (430.61) | -10.18 (-6.32) -1.4% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.29 mph (32.66 km/h) |
| 25 mph (40.23 km/h) | 25.37 mph (40.82 km/h) |
| 30 mph (48.28 km/h) | 30.44 mph (48.99 km/h) |
| 35 mph (56.33 km/h) | 35.51 mph (57.15 km/h) |
| 40 mph (64.37 km/h) | 40.59 mph (65.32 km/h) |
| 45 mph (72.42 km/h) | 45.66 mph (73.48 km/h) |
| 50 mph (80.47 km/h) | 50.73 mph (81.65 km/h) |
| 55 mph (88.51 km/h) | 55.81 mph (89.81 km/h) |
| 60 mph (96.56 km/h) | 60.88 mph (97.98 km/h) |
| 65 mph (104.61 km/h) | 65.95 mph (106.14 km/h) |
| 70 mph (112.65 km/h) | 71.03 mph (114.31 km/h) |
| 75 mph (120.7 km/h) | 76.1 mph (122.47 km/h) |
| 80 mph (128.75 km/h) | 81.18 mph (130.64 km/h) |
| 85 mph (136.79 km/h) | 86.25 mph (138.8 km/h) |
| 90 mph (144.84 km/h) | 91.32 mph (146.97 km/h) |
| 95 mph (152.89 km/h) | 96.4 mph (155.13 km/h) |
| 100 mph (160.93 km/h) | 101.47 mph (163.3 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
