Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/70-16 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.85 (707.4) | 27.25 (692.2) | -0.6 (-15.2) -2.1% |
| Width inches (mm) | 8.46 (215) | 9.25 (235) | 0.79 (20) 9.3% |
| Circum. inches (mm) | 87.49 (2222.36) | 85.61 (2174.61) | -1.88 (-47.75) -2.1% |
| Sidewall Height inches (mm) | 5.93 (150.5) | 4.63 (117.5) | -1.3 (-33) -21.9% |
| Revolutions per mile (km) | 724.16 (449.97) | 740.06 (459.85) | 15.9 (9.88) 2.2% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.57 mph (31.5 km/h) |
| 25 mph (40.23 km/h) | 24.46 mph (39.37 km/h) |
| 30 mph (48.28 km/h) | 29.36 mph (47.24 km/h) |
| 35 mph (56.33 km/h) | 34.25 mph (55.12 km/h) |
| 40 mph (64.37 km/h) | 39.14 mph (62.99 km/h) |
| 45 mph (72.42 km/h) | 44.03 mph (70.86 km/h) |
| 50 mph (80.47 km/h) | 48.93 mph (78.74 km/h) |
| 55 mph (88.51 km/h) | 53.82 mph (86.61 km/h) |
| 60 mph (96.56 km/h) | 58.71 mph (94.49 km/h) |
| 65 mph (104.61 km/h) | 63.6 mph (102.36 km/h) |
| 70 mph (112.65 km/h) | 68.5 mph (110.23 km/h) |
| 75 mph (120.7 km/h) | 73.39 mph (118.11 km/h) |
| 80 mph (128.75 km/h) | 78.28 mph (125.98 km/h) |
| 85 mph (136.79 km/h) | 83.17 mph (133.86 km/h) |
| 90 mph (144.84 km/h) | 88.07 mph (141.73 km/h) |
| 95 mph (152.89 km/h) | 92.96 mph (149.6 km/h) |
| 100 mph (160.93 km/h) | 97.85 mph (157.48 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
