335/30R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 335/30R21 tire size features an overall diameter of 28.91 inches, a section width of 13.2 inches (335mm), and rotates 698 times per mile. It is a standard factory tire fitment on 5+ vehicle models including Porsche 911.
Physical Dimensions & Specs
Overall Diameter
28.91"
734.3 mmSection Width
335 mm
13.19" wideSidewall Height
3.96"
100.6 mm (30% aspect)Revolutions / Mile
698
Circumference: 90.83"Rim Diameter
21"
Wheel sizeRecommended Rim Width
8.4" - 11.7"
Optimal rim width rangeWhere to Buy & Install 335/30R21 Tires
Looking for 335/30R21 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:
Tire Rack
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Amazon Automotive
Fast doorstep shipping for DIYers or bringing to your own shop.
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Speedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 335/30R21 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 20.5 mph | +0.5 mph |
| 30 mph | 30.7 mph | +0.7 mph |
| 45 mph | 46.0 mph | +1.0 mph |
| 60 mph | 61.4 mph | +1.4 mph |
| 75 mph | 76.7 mph | +1.7 mph |
| 90 mph | 92.1 mph | +2.1 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 335/30R21 (5+ Models)
Factory standard and optional vehicle fitments utilizing 335/30R21 tires: