235/40R20
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
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 rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 235/40R20 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)235/40R20
Overall Height:27.4"
Sidewall:3.7"
Revs/Mile:736
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+7.9%At 60 mph reading, actual speed is 64.8 mph
| 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
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:+1.09" ground clearance
Vehicles That Fit 235/40R20 (4+ Models)
Factory standard and optional vehicle fitments utilizing 235/40R20 tires: