P245/45R18
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The P245/45R18 tire size features an overall diameter of 26.68 inches, a section width of 9.6 inches (245mm), and rotates 756 times per mile. It is a standard factory tire fitment on 125+ vehicle models including Acura TL, Acura RL.
Physical Dimensions & Specs
Overall Diameter
26.68"
677.7 mmSection Width
245 mm
9.65" wideSidewall Height
4.34"
110.2 mm (45% aspect)Revolutions / Mile
756
Circumference: 83.82"Rim Diameter
18"
Wheel sizeRecommended Rim Width
6.1" - 8.6"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare P245/45R18 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)245/45R18
Overall Height:26.7"
Sidewall:4.3"
Revs/Mile:756
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+10.8%At 60 mph reading, actual speed is 66.5 mph
| 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 | 66.5 mph | +6.5 mph |
| 75 mph | 83.1 mph | +8.1 mph |
| 90 mph | 99.8 mph | +9.8 mph |
Fender & Suspension Clearance
Fitment Status: MODERATE RISK
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Inner Strut Space:7.7mm LESS clearance
Outer Fender Push:Extends 17.7mm further out
Ride Height Delta:+1.45" ground clearance
Vehicles That Fit P245/45R18 (125+ Models)
Factory standard and optional vehicle fitments utilizing P245/45R18 tires: