275/45R20
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
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 rangeWhere to Buy & Install 275/45R20 Tires
Looking for 275/45R20 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:
Tire Rack
Free shipping directly to over 10,000+ certified local installers.
- ✓Delivered to local installer (Firestone, Discount Tire & local shops)
- ✓Mobile installation available — mount & balance right in your driveway
- ✓Free 2-year road hazard warranty on most eligible tire models
Amazon Automotive
Fast doorstep shipping for DIYers or bringing to your own shop.
- ✓Prime doorstep shipping for home garages or spares
- ✓Huge range of budget and specialty tire sizes in stock
- ✓Ideal if you have a local independent mechanic you prefer
As an affiliate for Tire Rack and Amazon, we earn from qualifying purchases at no extra cost to you.
Speedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 275/45R20 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| 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
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 275/45R20 (150+ Models)
Factory standard and optional vehicle fitments utilizing 275/45R20 tires: