P285/30R20
Passenger / P-MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The P285/30R20 tire size features an overall diameter of 26.73 inches, a section width of 11.2 inches (285mm), and rotates 754 times per mile. It is a standard factory tire fitment on 24+ vehicle models including Chevrolet Corvette.
Physical Dimensions & Specs
Overall Diameter
26.73"
678.9 mmSection Width
285 mm
11.22" wideSidewall Height
3.37"
85.6 mm (30% aspect)Revolutions / Mile
754
Circumference: 83.98"Rim Diameter
20"
Wheel sizeRecommended Rim Width
7.1" - 10"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare P285/30R20 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)285/30R20
Overall Height:26.7"
Sidewall:3.4"
Revs/Mile:754
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+10.6%At 60 mph reading, actual speed is 66.4 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 22.1 mph | +2.1 mph |
| 30 mph | 33.2 mph | +3.2 mph |
| 45 mph | 49.8 mph | +4.8 mph |
| 60 mph | 66.4 mph | +6.4 mph |
| 75 mph | 83.0 mph | +8.0 mph |
| 90 mph | 99.6 mph | +9.6 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:+1.42" ground clearance
Vehicles That Fit P285/30R20 (24+ Models)
Factory standard and optional vehicle fitments utilizing P285/30R20 tires: