Tire Size Finder (optional):
Stock Sizes 
- 255/75-16
Plus Sizes
- 255/75-16
Continental ContiProContact235/45-R18$159 each
Michelin Pilot HX MXM4235/45-R18$198 eachSee All 235/45-18 Tires (50)- Tire Pressure Chalk Test
- Understanding metric sizes
Accepts P-Metric and Inches
| 225/50-18 | 235/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.86 (682.2) | 26.33 (668.7) | -0.53 (-13.5) -2% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 84.38 (2143.19) | 82.71 (2100.78) | -1.67 (-42.41) -2% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 4.16 (105.75) | -0.27 (-6.75) -6% |
| Revolutions per mile (km) | 750.91 (466.59) | 766.07 (476.01) | 15.16 (9.42) 2% |
235/45-18 Tires
Continental ContiProContact
235/45-R18
$159 each
Michelin Pilot HX MXM4
235/45-R18
$198 each
See All 235/45-18 Tires (50)
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.6 mph (31.55 km/h) |
| 25 mph (40.23 km/h) | 24.51 mph (39.44 km/h) |
| 30 mph (48.28 km/h) | 29.41 mph (47.32 km/h) |
| 35 mph (56.33 km/h) | 34.31 mph (55.21 km/h) |
| 40 mph (64.37 km/h) | 39.21 mph (63.1 km/h) |
| 45 mph (72.42 km/h) | 44.11 mph (70.99 km/h) |
| 50 mph (80.47 km/h) | 49.01 mph (78.87 km/h) |
| 55 mph (88.51 km/h) | 53.91 mph (86.76 km/h) |
| 60 mph (96.56 km/h) | 58.81 mph (94.65 km/h) |
| 65 mph (104.61 km/h) | 63.71 mph (102.54 km/h) |
| 70 mph (112.65 km/h) | 68.61 mph (110.42 km/h) |
| 75 mph (120.7 km/h) | 73.52 mph (118.31 km/h) |
| 80 mph (128.75 km/h) | 78.42 mph (126.2 km/h) |
| 85 mph (136.79 km/h) | 83.32 mph (134.09 km/h) |
| 90 mph (144.84 km/h) | 88.22 mph (141.97 km/h) |
| 95 mph (152.89 km/h) | 93.12 mph (149.86 km/h) |
| 100 mph (160.93 km/h) | 98.02 mph (157.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1949 | 2265 | 2439 | 2547 | 2663 | 2746 | 2837 | 2945 | 3094 | 3244 | 3410 | 3542 | 3783 | 4048 | 4256 | 4388 | 4463 | 4737 | 5118 | 5948 |
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Most Popular 225/50-R18 Comparisons
vs 235/45-18 vs 245/45-18 vs 235/50-18 vs 225/55-18 vs 225/45-18 vs 225/55-17 vs 235/55-18 vs 225/40-18
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