225/45R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 225/45R21 tire size features an overall diameter of 28.97 inches, a section width of 8.9 inches (225mm), and rotates 696 times per mile. It is a standard factory tire fitment on 4+ vehicle models including Toyota Crown.
Physical Dimensions & Specs
Overall Diameter
28.97"
735.8 mmSection Width
225 mm
8.86" wideSidewall Height
3.99"
101.3 mm (45% aspect)Revolutions / Mile
696
Circumference: 91.02"Rim Diameter
21"
Wheel sizeRecommended Rim Width
5.6" - 7.9"
Optimal rim width rangeWhere to Buy & Install 225/45R21 Tires
Looking for 225/45R21 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 225/45R21 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 20.4 mph | +0.4 mph |
| 30 mph | 30.6 mph | +0.6 mph |
| 45 mph | 45.9 mph | +0.9 mph |
| 60 mph | 61.2 mph | +1.2 mph |
| 75 mph | 76.6 mph | +1.6 mph |
| 90 mph | 91.9 mph | +1.9 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 225/45R21 (4+ Models)
Factory standard and optional vehicle fitments utilizing 225/45R21 tires: