315/30R20
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 315/30R20 tire size features an overall diameter of 27.44 inches, a section width of 12.4 inches (315mm), and rotates 735 times per mile. It is a standard factory tire fitment on 3+ vehicle models including Ford Mustang.
Physical Dimensions & Specs
Overall Diameter
27.44"
697.0 mmSection Width
315 mm
12.40" wideSidewall Height
3.72"
94.5 mm (30% aspect)Revolutions / Mile
735
Circumference: 86.21"Rim Diameter
20"
Wheel sizeRecommended Rim Width
7.9" - 11"
Optimal rim width rangeWhere to Buy & Install 315/30R20 Tires
Looking for 315/30R20 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 315/30R20 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 21.6 mph | +1.6 mph |
| 30 mph | 32.3 mph | +2.3 mph |
| 45 mph | 48.5 mph | +3.5 mph |
| 60 mph | 64.7 mph | +4.7 mph |
| 75 mph | 80.8 mph | +5.8 mph |
| 90 mph | 97.0 mph | +7.0 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 315/30R20 (3+ Models)
Factory standard and optional vehicle fitments utilizing 315/30R20 tires: