P255/45R17
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The P255/45R17 tire size features an overall diameter of 26.04 inches, a section width of 10.0 inches (255mm), and rotates 775 times per mile. It is a standard factory tire fitment on 32+ vehicle models including Cadillac STS.
Physical Dimensions & Specs
Overall Diameter
26.04"
661.4 mmSection Width
255 mm
10.04" wideSidewall Height
4.52"
114.8 mm (45% aspect)Revolutions / Mile
775
Circumference: 81.79"Rim Diameter
17"
Wheel sizeRecommended Rim Width
6.4" - 8.9"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare P255/45R17 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)255/45R17
Overall Height:26.0"
Sidewall:4.5"
Revs/Mile:775
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+13.6%At 60 mph reading, actual speed is 68.2 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 22.7 mph | +2.7 mph |
| 30 mph | 34.1 mph | +4.1 mph |
| 45 mph | 51.1 mph | +6.1 mph |
| 60 mph | 68.2 mph | +8.2 mph |
| 75 mph | 85.2 mph | +10.2 mph |
| 90 mph | 102.2 mph | +12.2 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:+1.77" ground clearance
Vehicles That Fit P255/45R17 (32+ Models)
Factory standard and optional vehicle fitments utilizing P255/45R17 tires: