275/45R20
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 275/45R20 tire size features an overall diameter of 29.74 inches, a section width of 10.8 inches (275mm), and rotates 678 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Audi Q7.
Physical Dimensions & Specs
Overall Diameter
29.74"
755.4 mmSection Width
275 mm
10.83" wideSidewall Height
4.87"
123.7 mm (45% aspect)Revolutions / Mile
678
Circumference: 93.44"Rim Diameter
20"
Wheel sizeRecommended Rim Width
6.9" - 9.6"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 275/45R20 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)275/45R20
Overall Height:29.7"
Sidewall:4.9"
Revs/Mile:678
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
-0.6%At 60 mph reading, actual speed is 59.7 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 19.9 mph | -0.1 mph |
| 30 mph | 29.8 mph | -0.2 mph |
| 45 mph | 44.7 mph | -0.3 mph |
| 60 mph | 59.7 mph | -0.3 mph |
| 75 mph | 74.6 mph | -0.4 mph |
| 90 mph | 89.5 mph | -0.5 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:-0.08" lower ground clearance
Vehicles That Fit 275/45R20 (150+ Models)
Factory standard and optional vehicle fitments utilizing 275/45R20 tires: