P255/65R18
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The P255/65R18 tire size features an overall diameter of 31.05 inches, a section width of 10.0 inches (255mm), and rotates 650 times per mile. It is a standard factory tire fitment on 44+ vehicle models including Buick Enclave.
Physical Dimensions & Specs
Overall Diameter
31.05"
788.7 mmSection Width
255 mm
10.04" wideSidewall Height
6.53"
165.9 mm (65% aspect)Revolutions / Mile
650
Circumference: 97.55"Rim Diameter
18"
Wheel sizeRecommended Rim Width
6.4" - 8.9"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare P255/65R18 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)255/65R18
Overall Height:31.1"
Sidewall:6.5"
Revs/Mile:650
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
-4.8%At 60 mph reading, actual speed is 57.1 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 19.0 mph | -1.0 mph |
| 30 mph | 28.6 mph | -1.4 mph |
| 45 mph | 42.9 mph | -2.1 mph |
| 60 mph | 57.1 mph | -2.9 mph |
| 75 mph | 71.4 mph | -3.6 mph |
| 90 mph | 85.7 mph | -4.3 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:-0.74" lower ground clearance
Vehicles That Fit P255/65R18 (44+ Models)
Factory standard and optional vehicle fitments utilizing P255/65R18 tires: