Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.62 (650.7) | 27.25 (692.2) | 1.63 (41.5) 6.4% |
| Width inches (mm) | 8.46 (215) | 9.25 (235) | 0.79 (20) 9.3% |
| Circum. inches (mm) | 80.48 (2044.23) | 85.61 (2174.61) | 5.13 (130.38) 6.4% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 4.63 (117.5) | 0.82 (20.75) 21.4% |
| Revolutions per mile (km) | 787.26 (489.18) | 740.06 (459.85) | -47.2 (-29.33) -6% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.28 mph (34.24 km/h) |
| 25 mph (40.23 km/h) | 26.59 mph (42.8 km/h) |
| 30 mph (48.28 km/h) | 31.91 mph (51.36 km/h) |
| 35 mph (56.33 km/h) | 37.23 mph (59.92 km/h) |
| 40 mph (64.37 km/h) | 42.55 mph (68.48 km/h) |
| 45 mph (72.42 km/h) | 47.87 mph (77.04 km/h) |
| 50 mph (80.47 km/h) | 53.19 mph (85.6 km/h) |
| 55 mph (88.51 km/h) | 58.51 mph (94.16 km/h) |
| 60 mph (96.56 km/h) | 63.83 mph (102.72 km/h) |
| 65 mph (104.61 km/h) | 69.15 mph (111.28 km/h) |
| 70 mph (112.65 km/h) | 74.46 mph (119.84 km/h) |
| 75 mph (120.7 km/h) | 79.78 mph (128.4 km/h) |
| 80 mph (128.75 km/h) | 85.1 mph (136.96 km/h) |
| 85 mph (136.79 km/h) | 90.42 mph (145.52 km/h) |
| 90 mph (144.84 km/h) | 95.74 mph (154.08 km/h) |
| 95 mph (152.89 km/h) | 101.06 mph (162.64 km/h) |
| 100 mph (160.93 km/h) | 106.38 mph (171.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1883 | 2188 | 2356 | 2460 | 2573 | 2653 | 2741 | 2845 | 2989 | 3134 | 3294 | 3422 | 3654 | 3911 | 4111 | 4239 | 4312 | 4576 | 4945 | 5746 |
Better Fuel Economy Factory Ratios Increased Power
