Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-20 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.04 (763) | 29.1 (739.2) | -0.94 (-23.8) -3.1% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 94.37 (2397.04) | 91.43 (2322.27) | -2.94 (-74.77) -3.1% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 5.55 (141) | 0.53 (13.5) 10.6% |
| Revolutions per mile (km) | 671.39 (417.18) | 693.01 (430.61) | 21.62 (13.43) 3.2% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.38 mph (31.18 km/h) |
| 25 mph (40.23 km/h) | 24.22 mph (38.98 km/h) |
| 30 mph (48.28 km/h) | 29.06 mph (46.77 km/h) |
| 35 mph (56.33 km/h) | 33.91 mph (54.57 km/h) |
| 40 mph (64.37 km/h) | 38.75 mph (62.37 km/h) |
| 45 mph (72.42 km/h) | 43.6 mph (70.16 km/h) |
| 50 mph (80.47 km/h) | 48.44 mph (77.96 km/h) |
| 55 mph (88.51 km/h) | 53.28 mph (85.75 km/h) |
| 60 mph (96.56 km/h) | 58.13 mph (93.55 km/h) |
| 65 mph (104.61 km/h) | 62.97 mph (101.34 km/h) |
| 70 mph (112.65 km/h) | 67.82 mph (109.14 km/h) |
| 75 mph (120.7 km/h) | 72.66 mph (116.94 km/h) |
| 80 mph (128.75 km/h) | 77.5 mph (124.73 km/h) |
| 85 mph (136.79 km/h) | 82.35 mph (132.53 km/h) |
| 90 mph (144.84 km/h) | 87.19 mph (140.32 km/h) |
| 95 mph (152.89 km/h) | 92.04 mph (148.12 km/h) |
| 100 mph (160.93 km/h) | 96.88 mph (155.91 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
