235/40R20
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 235/40R20 tire size features an overall diameter of 27.4 inches, a section width of 9.3 inches (235mm), and rotates 736 times per mile. It is a standard factory tire fitment on 4+ vehicle models including Alfa Romeo Tonale.
Physical Dimensions & Specs
Overall Diameter
27.4"
696.0 mmSection Width
235 mm
9.25" wideSidewall Height
3.7"
94.0 mm (40% aspect)Revolutions / Mile
736
Circumference: 86.08"Rim Diameter
20"
Wheel sizeRecommended Rim Width
5.9" - 8.2"
Optimal rim width rangeWhere to Buy & Install 235/40R20 Tires
Looking for 235/40R20 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 235/40R20 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 | 32.4 mph | +2.4 mph |
| 45 mph | 48.6 mph | +3.6 mph |
| 60 mph | 64.8 mph | +4.8 mph |
| 75 mph | 80.9 mph | +5.9 mph |
| 90 mph | 97.1 mph | +7.1 mph |
Fender & Suspension Clearance
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 235/40R20 (4+ Models)
Factory standard and optional vehicle fitments utilizing 235/40R20 tires: