265/45R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 265/45R21 tire size features an overall diameter of 30.39 inches, a section width of 10.4 inches (265mm), and rotates 664 times per mile. It is a standard factory tire fitment on 50+ vehicle models including Audi e-tron Quattro, Audi e-tron Sportback.
Physical Dimensions & Specs
Overall Diameter
30.39"
771.9 mmSection Width
265 mm
10.43" wideSidewall Height
4.69"
119.1 mm (45% aspect)Revolutions / Mile
664
Circumference: 95.47"Rim Diameter
21"
Wheel sizeRecommended Rim Width
6.6" - 9.3"
Optimal rim width rangeWhere to Buy & Install 265/45R21 Tires
Looking for 265/45R21 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 265/45R21 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 19.5 mph | -0.5 mph |
| 30 mph | 29.2 mph | -0.8 mph |
| 45 mph | 43.8 mph | -1.2 mph |
| 60 mph | 58.4 mph | -1.6 mph |
| 75 mph | 73.0 mph | -2.0 mph |
| 90 mph | 87.6 mph | -2.4 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 265/45R21 (50+ Models)
Factory standard and optional vehicle fitments utilizing 265/45R21 tires: