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245/50R20 tires: size explained

245/50R20

245/50R20 is a Euro-metric tire size. It is about 29.6 in (753 mm) tall, 245 mm wide, and made for a 20-inch wheel.

What 245/50R20 means

A tire size describes the tire's shape and the wheel it fits. It says nothing about load capacity or speed capability, which are printed separately on the sidewall.

No letterEuro-metric
With no letter in front of the width, this is a Euro-metric size (also called hard metric). It has the same dimensions as the P-metric version but is built to a different load standard, so its load capacity can differ.
245Section width
The tire's width is 245 millimeters (9.6 in), measured from sidewall to sidewall.
50Aspect ratio
The sidewall height is 50% of the width. For 245 mm that is about 4.8 in (123 mm). A smaller number means a shorter sidewall.
RRadial construction
R means radial construction, where the internal cords run across the tire from one edge to the other.
20Wheel (rim) diameter
The tire is made for a wheel 20 inches across. Its overall diameter is larger: about 29.6 in (753 mm).

245/50R20 dimensions

29.6 inOverall diameter: 29.6 in (753 mm)Rim diameter: 20.0 in (508 mm)Sidewall height: 4.8 in (123 mm)9.6 inSection width: 9.6 in (245 mm)Sidewall height: 4.8 in (123 mm)
Each drawing is to scale on its own. The curves of the tread shoulder and bead are simplified; the table below has the same numbers.
Section width
9.6 in (245 mm)
Sidewall height
4.8 in (123 mm)
Wheel (rim) diameter
20.0 in (508 mm)
Overall diameter
29.6 in (753 mm)
Circumference
93.1 in (2366 mm)
Revolutions per mile
680

These are nominal design dimensions. Real tires vary by brand, tread depth, wheel width, load and pressure.

Which vehicles use 245/50R20?

These vehicles list 245/50R20 among their verified sizes, by trim. Open one to see all of its sizes.

Showing 100 of 123 vehicles.

Shop for 245/50R20 tires

Confirm the size on your tire sidewall or door placard first. These links open each store's own search for 245/50R20; prices and stock are on their sites.

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Snow chains and tire socks for 245/50R20

Where winter roads call for extra traction, chains and tire socks are two options that fit over your tires. They are made for specific tire sizes, so these links open Amazon searches for 245/50R20. Whether they suit your vehicle depends on its clearance and the local rules.

Snow chains for 245/50R20 (Amazon search, opens in a new tab)Tire socks for 245/50R20 (Amazon search, opens in a new tab)

Paid links to Amazon search results. As an Amazon Associate I earn from qualifying purchases. Read our affiliate disclosure.

Before you buy

  • Chains and socks are sold by tire size, so match the size on your sidewall exactly.
  • Check your owner's manual first: many newer cars and SUVs limit or prohibit chains, or require low-profile (often called SAE Class S) chains because of tight wheel-well clearance.
  • Tire socks are a lighter-duty option; check your state's rules, because some areas only accept chains when chain controls are in effect.
  • Put them on the drive wheels (or as your manual says) and follow the maker's speed limit.

Similar sizes

These common sizes have an overall diameter within about 3% of 245/50R20. A common rule of thumb is to keep a replacement size within about 3% of the original overall diameter. Confirm any size change with your vehicle's owner's manual or a tire professional.

Common sizes with an overall diameter close to 245/50R20
SizeWheel diameterDiameter differenceCalculator
245/60R1818 in (different)-0.24%Compare 245/50R20 with 245/60R18
235/60R1818 in (different)-1.83%Compare 245/50R20 with 235/60R18
255/55R1818 in (different)-2.03%Compare 245/50R20 with 255/55R18
235/65R1717 in (different)-2.08%Compare 245/50R20 with 235/65R17
245/75R1616 in (different)+2.78%Compare 245/50R20 with 245/75R16
LT245/75R1616 in (different)+2.78%Compare 245/50R20 with LT245/75R16

Same dimensions, different load standard

P245/50R20 (P-metric) has the same dimensions as 245/50R20, but it is built to a different load standard. Check the load index on the sidewall rather than assuming the two are interchangeable.

Compare 245/50R20 with similar sizes

Side-by-side dimensions and speedometer difference for sizes close to 245/50R20 in overall diameter.

Compare 245/50R20 with another size

See how another size differs in height, width, sidewall and speedometer reading in the tire size calculator.

Compare 245/50R20 with another size

Questions about 245/50R20

What does 245/50R20 mean?

245/50R20 describes the shape and size of a tire, not how much it can carry or how fast it can go. 245 is the width in millimeters, 50 is the sidewall height as a percentage of that width (about 123 mm), R is the construction type and 20 is the wheel diameter in inches.

How tall is a 245/50R20 tire?

A 245/50R20 tire has a nominal overall diameter of about 29.6 in (753 mm), with a sidewall about 4.8 in (123 mm) tall. These are nominal design dimensions. Real tires vary by brand, tread depth, wheel width, load and pressure.

How many revolutions per mile does a 245/50R20 tire make?

About 680 revolutions per mile, based on a circumference of 93.1 in (2366 mm). A vehicle's speedometer and odometer are calibrated to the tire size it was built with, so a size with a different overall diameter changes what they read. A common rule of thumb is to keep a replacement size within about 3% of the original overall diameter. Confirm any size change with your vehicle's owner's manual or a tire professional.

Is 245/50R20 the same as P245/50R20?

They have the same dimensions: both are about 29.6 in (753 mm) tall and 245 mm wide. They are built to different load standards, though (Euro-metric and P-metric), so the load a tire can carry can differ. Check the load index on the sidewall, and ask a tire professional or your owner's manual before treating them as interchangeable.

Which sizes have a similar diameter to 245/50R20?

Among the common sizes we list, these are within about 3% of the overall diameter of 245/50R20: 245/60R18 (-0.24%), 235/60R18 (-1.83%), 255/55R18 (-2.03%), and 3 more. Diameter is only one measure. Width, wheel diameter, load capacity and clearance matter too. Confirm any size change with your vehicle's owner's manual or a tire professional.

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Paid links to Amazon search results. As an Amazon Associate I earn from qualifying purchases. Read our affiliate disclosure.