Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-18 | 235/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.04 (686.7) | 29.1 (739.2) | 2.07 (52.5) 7.6% |
| Width inches (mm) | 10.04 (255) | 9.25 (235) | -0.79 (-20) -7.8% |
| Circum. inches (mm) | 84.93 (2157.33) | 91.43 (2322.27) | 6.49 (164.93) 7.6% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 5.55 (141) | 1.03 (26.25) 22.9% |
| Revolutions per mile (km) | 745.99 (463.53) | 693.01 (430.61) | -52.98 (-32.92) -7.1% |
235/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.53 mph (34.65 km/h) |
| 25 mph (40.23 km/h) | 26.91 mph (43.31 km/h) |
| 30 mph (48.28 km/h) | 32.29 mph (51.97 km/h) |
| 35 mph (56.33 km/h) | 37.68 mph (60.63 km/h) |
| 40 mph (64.37 km/h) | 43.06 mph (69.3 km/h) |
| 45 mph (72.42 km/h) | 48.44 mph (77.96 km/h) |
| 50 mph (80.47 km/h) | 53.82 mph (86.62 km/h) |
| 55 mph (88.51 km/h) | 59.2 mph (95.28 km/h) |
| 60 mph (96.56 km/h) | 64.59 mph (103.94 km/h) |
| 65 mph (104.61 km/h) | 69.97 mph (112.61 km/h) |
| 70 mph (112.65 km/h) | 75.35 mph (121.27 km/h) |
| 75 mph (120.7 km/h) | 80.73 mph (129.93 km/h) |
| 80 mph (128.75 km/h) | 86.12 mph (138.59 km/h) |
| 85 mph (136.79 km/h) | 91.5 mph (147.25 km/h) |
| 90 mph (144.84 km/h) | 96.88 mph (155.91 km/h) |
| 95 mph (152.89 km/h) | 102.26 mph (164.58 km/h) |
| 100 mph (160.93 km/h) | 107.65 mph (173.24 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
