175/55R20
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 175/55R20 tire size features an overall diameter of 27.58 inches, a section width of 6.9 inches (175mm), and rotates 731 times per mile. It is a standard factory tire fitment on 8+ vehicle models including BMW i3.
Physical Dimensions & Specs
Overall Diameter
27.58"
700.5 mmSection Width
175 mm
6.89" wideSidewall Height
3.79"
96.3 mm (55% aspect)Revolutions / Mile
731
Circumference: 86.64"Rim Diameter
20"
Wheel sizeRecommended Rim Width
4.4" - 6.1"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 175/55R20 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)175/55R20
Overall Height:27.6"
Sidewall:3.8"
Revs/Mile:731
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+7.2%At 60 mph reading, actual speed is 64.3 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 21.4 mph | +1.4 mph |
| 30 mph | 32.2 mph | +2.2 mph |
| 45 mph | 48.3 mph | +3.3 mph |
| 60 mph | 64.3 mph | +4.3 mph |
| 75 mph | 80.4 mph | +5.4 mph |
| 90 mph | 96.5 mph | +6.5 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:+1.00" ground clearance
Vehicles That Fit 175/55R20 (8+ Models)
Factory standard and optional vehicle fitments utilizing 175/55R20 tires: