P275/40R18
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The P275/40R18 tire size features an overall diameter of 26.66 inches, a section width of 10.8 inches (275mm), and rotates 756 times per mile. It is a standard factory tire fitment on 36+ vehicle models including Chevrolet Corvette.
Physical Dimensions & Specs
Overall Diameter
26.66"
677.2 mmSection Width
275 mm
10.83" wideSidewall Height
4.33"
110.0 mm (40% aspect)Revolutions / Mile
756
Circumference: 83.76"Rim Diameter
18"
Wheel sizeRecommended Rim Width
6.9" - 9.6"
Optimal rim width rangeWhere to Buy & Install P275/40R18 Tires
Looking for P275/40R18 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:
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Speedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare P275/40R18 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 22.2 mph | +2.2 mph |
| 30 mph | 33.3 mph | +3.3 mph |
| 45 mph | 49.9 mph | +4.9 mph |
| 60 mph | 66.6 mph | +6.6 mph |
| 75 mph | 83.2 mph | +8.2 mph |
| 90 mph | 99.8 mph | +9.8 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit P275/40R18 (36+ Models)
Factory standard and optional vehicle fitments utilizing P275/40R18 tires: