265/45R18
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 265/45R18 tire size features an overall diameter of 27.39 inches, a section width of 10.4 inches (265mm), and rotates 736 times per mile. It is a standard factory tire fitment on 54+ vehicle models including Cadillac CT6, Porsche Boxster.
Physical Dimensions & Specs
Overall Diameter
27.39"
695.7 mmSection Width
265 mm
10.43" wideSidewall Height
4.69"
119.1 mm (45% aspect)Revolutions / Mile
736
Circumference: 86.05"Rim Diameter
18"
Wheel sizeRecommended Rim Width
6.6" - 9.3"
Optimal rim width rangeWhere to Buy & Install 265/45R18 Tires
Looking for 265/45R18 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 265/45R18 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 21.6 mph | +1.6 mph |
| 30 mph | 32.4 mph | +2.4 mph |
| 45 mph | 48.6 mph | +3.6 mph |
| 60 mph | 64.8 mph | +4.8 mph |
| 75 mph | 81.0 mph | +6.0 mph |
| 90 mph | 97.2 mph | +7.2 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 265/45R18 (54+ Models)
Factory standard and optional vehicle fitments utilizing 265/45R18 tires: