285/35R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 285/35R21 tire size features an overall diameter of 28.85 inches, a section width of 11.2 inches (285mm), and rotates 699 times per mile. It is a standard factory tire fitment on 12+ vehicle models including Alfa Romeo Stelvio.
Physical Dimensions & Specs
Overall Diameter
28.85"
732.8 mmSection Width
285 mm
11.22" wideSidewall Height
3.93"
99.8 mm (35% aspect)Revolutions / Mile
699
Circumference: 90.65"Rim Diameter
21"
Wheel sizeRecommended Rim Width
7.1" - 10"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 285/35R21 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)285/35R21
Overall Height:28.9"
Sidewall:3.9"
Revs/Mile:699
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+2.5%At 60 mph reading, actual speed is 61.5 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 20.5 mph | +0.5 mph |
| 30 mph | 30.7 mph | +0.7 mph |
| 45 mph | 46.1 mph | +1.1 mph |
| 60 mph | 61.5 mph | +1.5 mph |
| 75 mph | 76.9 mph | +1.9 mph |
| 90 mph | 92.2 mph | +2.2 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:+0.36" ground clearance
Vehicles That Fit 285/35R21 (12+ Models)
Factory standard and optional vehicle fitments utilizing 285/35R21 tires: