335/30R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
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 rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 335/30R21 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)335/30R21
Overall Height:28.9"
Sidewall:4.0"
Revs/Mile:698
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+2.3%At 60 mph reading, actual speed is 61.4 mph
| 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
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:+0.33" ground clearance
Vehicles That Fit 335/30R21 (5+ Models)
Factory standard and optional vehicle fitments utilizing 335/30R21 tires: