275/35R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 275/35R21 tire size features an overall diameter of 28.58 inches, a section width of 10.8 inches (275mm), and rotates 706 times per mile. It is a standard factory tire fitment on 71+ vehicle models including Audi S8.
Physical Dimensions & Specs
Overall Diameter
28.58"
725.9 mmSection Width
275 mm
10.83" wideSidewall Height
3.79"
96.3 mm (35% aspect)Revolutions / Mile
706
Circumference: 89.78"Rim Diameter
21"
Wheel sizeRecommended Rim Width
6.9" - 9.6"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 275/35R21 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)275/35R21
Overall Height:28.6"
Sidewall:3.8"
Revs/Mile:706
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+3.5%At 60 mph reading, actual speed is 62.1 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 20.7 mph | +0.7 mph |
| 30 mph | 31.0 mph | +1.0 mph |
| 45 mph | 46.6 mph | +1.6 mph |
| 60 mph | 62.1 mph | +2.1 mph |
| 75 mph | 77.6 mph | +2.6 mph |
| 90 mph | 93.1 mph | +3.1 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:+0.50" ground clearance
Vehicles That Fit 275/35R21 (71+ Models)
Factory standard and optional vehicle fitments utilizing 275/35R21 tires: