P225/40R18
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The P225/40R18 tire size features an overall diameter of 25.09 inches, a section width of 8.9 inches (225mm), and rotates 804 times per mile. It is a standard factory tire fitment on 42+ vehicle models including Kia Forte5, Kia Forte Koup.
Physical Dimensions & Specs
Overall Diameter
25.09"
637.3 mmSection Width
225 mm
8.86" wideSidewall Height
3.54"
89.9 mm (40% aspect)Revolutions / Mile
804
Circumference: 78.81"Rim Diameter
18"
Wheel sizeRecommended Rim Width
5.6" - 7.9"
Optimal rim width rangeWhere to Buy & Install P225/40R18 Tires
Looking for P225/40R18 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 P225/40R18 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 23.6 mph | +3.6 mph |
| 30 mph | 35.4 mph | +5.4 mph |
| 45 mph | 53.1 mph | +8.1 mph |
| 60 mph | 70.7 mph | +10.7 mph |
| 75 mph | 88.4 mph | +13.4 mph |
| 90 mph | 106.1 mph | +16.1 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit P225/40R18 (42+ Models)
Factory standard and optional vehicle fitments utilizing P225/40R18 tires: