305/40R20 Tires
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Find it on your tire sidewall, e.g. 215/60R16
How to read 305/40R20
The size 305/40R20 gives three measurements: tread width 305 mm, sidewall height 122 mm (40% of the width), and rim size 20 in. Overall diameter is 752 mm (about 29.6 in). One full turn covers 2.36 m, or 423 turns per km.
To learn what each number means, read How to read a tire size
Cars with 305/40R20 as the factory size
- BMW X5 (G05) · 2019–present (rear)
Based on the factory sizes we see most often. Different trims of the same model may use different sizes. Confirm with the numbers on your current tire's sidewall.
Other 20-inch sizes in stock
Other 20-inch tire sizes in stock now. Tap a size to see prices and models.
The sizes above are not substitutes. They are just other sizes for the same rim that we have in stock. Switching sizes depends on your car's actual rim width, load index, and wheel-well clearance, which this website can't check. To switch sizes, send a photo of your current tire's sidewall and your car model to LINE @subphaisal and our technicians will help.