245/50R18
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 245/50R18 tire size features an overall diameter of 27.65 inches, a section width of 9.6 inches (245mm), and rotates 730 times per mile. It is a standard factory tire fitment on 150+ vehicle models including BMW 745i, BMW 745Li.
Physical Dimensions & Specs
Overall Diameter
27.65"
702.3 mmSection Width
245 mm
9.65" wideSidewall Height
4.82"
122.4 mm (50% aspect)Revolutions / Mile
730
Circumference: 86.85"Rim Diameter
18"
Wheel sizeRecommended Rim Width
6.1" - 8.6"
Optimal rim width rangeWhere to Buy & Install 245/50R18 Tires
Looking for 245/50R18 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:
Tire Rack
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Amazon Automotive
Fast doorstep shipping for DIYers or bringing to your own shop.
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Speedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 245/50R18 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 21.4 mph | +1.4 mph |
| 30 mph | 32.1 mph | +2.1 mph |
| 45 mph | 48.1 mph | +3.1 mph |
| 60 mph | 64.2 mph | +4.2 mph |
| 75 mph | 80.2 mph | +5.2 mph |
| 90 mph | 96.3 mph | +6.3 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 245/50R18 (150+ Models)
Factory standard and optional vehicle fitments utilizing 245/50R18 tires: