P285/40R17
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The P285/40R17 tire size features an overall diameter of 25.98 inches, a section width of 11.2 inches (285mm), and rotates 776 times per mile. It is a standard factory tire fitment on 16+ vehicle models including Chevrolet Corvette.
Physical Dimensions & Specs
Overall Diameter
25.98"
659.9 mmSection Width
285 mm
11.22" wideSidewall Height
4.49"
114.0 mm (40% aspect)Revolutions / Mile
776
Circumference: 81.61"Rim Diameter
17"
Wheel sizeRecommended Rim Width
7.1" - 10"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare P285/40R17 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)285/40R17
Overall Height:26.0"
Sidewall:4.5"
Revs/Mile:776
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+13.9%At 60 mph reading, actual speed is 68.3 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 22.8 mph | +2.8 mph |
| 30 mph | 34.2 mph | +4.2 mph |
| 45 mph | 51.2 mph | +6.2 mph |
| 60 mph | 68.3 mph | +8.3 mph |
| 75 mph | 85.4 mph | +10.4 mph |
| 90 mph | 102.5 mph | +12.5 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:+1.80" ground clearance
Vehicles That Fit P285/40R17 (16+ Models)
Factory standard and optional vehicle fitments utilizing P285/40R17 tires: