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Goodyear Eagle F1 Asymmetric 255/50 R20 109Y

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The Goodyear Eagle F1 Asymmetric is an ultra-high performance tire that provides excellent grip and handling in both dry and wet conditions. The asymmetric tread pattern and advanced compound help to deliver outstanding traction, while the wide tread grooves help to evacuate water for improved grip in wet weather. The Eagle F1 Asymmetric also features Goodyear’s RunOnFlat technology, which allows the tire to be driven for up to 50 miles at 50 mph in the event of a puncture. This tire is designed for use in dry and wet conditions. It is not designed for use in snow or ice.

What does 255/50R20 mean?


The tire width is 255mm.


The aspect ratio of the tire is 50. Aspect ratio is the relative height of tire sidewall. The number refers to the percentage of sidewall height in relation to tire width.


The letter in the middle refers to tire construction. Practically all tires sold for cars are radials.

Sometimes you also see tires with RF or ZR. RF indicates the tire is run flat, whereas ZR means the tire has speed rating higher than V. These tires are also radials, as the R indicates.


Rim diameter for the tire.

255/50R20 109Y tire size

The width of 255/50R20 109Y tire is stated in millimeters and sidewall height in percentages. In this table you’ll find out the 255/50R20 109Y tire size in inches as well as few additional metrics:

In inches In millimeters

Section Width

10.0″ 255mm

Sidewall height

5.0″ 128mm

Diameter / Height

30.0″ 763mm


94.4″ 2397mm

Rim Diameter



671 per mile 417 per kilometer

Rim Size for 255/50R20 109Y Tires

Recommended rim sizes for 255/50R20 109Y tire:

Diameter Width Range
20″ 7-9″

What does 109Y mean?

The load index 109 means that the tire has been designed to support 2271 lbs or 1030 kg.

The speed index Y means that the tire has been designed to be used in speed up to 186 mph or 300 kph.

This size tire is usually used on a passenger car.


Goodyear is an American tire company founded in 1898 by Frank Seiberling and based in Akron, Ohio. The company was named after Charles Goodyear, the inventor of vulcanized rubber. Goodyear manufactures tires for automobiles, commercial trucks, light trucks, motorcycles, SUVs, race cars, airplanes, and heavy equipment.

Tire Specification

Brand: Goodyear
Model: Eagle F1 Asymmetric
Season: Summer
Size: 255/50 R20
Load Index: 109 — 1030 kg | x4 - 4120 kg
Speed Index: Y — 300 km\h
Car Type:Passenger
Road: City
XL / Extra Load: No
RunFlat technology: No
Commercial / Reinforced: No