Sunny NA305 245/45 R20 103W

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The Sunny NA305 is an all-season tire that offers excellent traction and handling in both wet and dry conditions. The tire features a tread pattern that helps to reduce noise levels and improve ride comfort. The NA305 also has a longer tread life than many other all-season tires on the market, making it a great choice for drivers who want a reliable tire that will last. This tire is designed to be used in sunny conditions.

What does 245/45R20 mean?


The tire width is 245mm.


The aspect ratio of the tire is 45. 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.

245/45R20 103W tire size

The width of 245/45R20 103W tire is stated in millimeters and sidewall height in percentages. In this table you’ll find out the 245/45R20 103W tire size in inches as well as few additional metrics:

In inches In millimeters

Section Width

9.6″ 245mm

Sidewall height

4.3″ 110mm

Diameter / Height

28.7″ 729mm


90.1″ 2289mm

Rim Diameter



703 per mile 437 per kilometer

Rim Size for 245/45R20 103W Tires

Recommended rim sizes for 245/45R20 103W tire:

Diameter Width Range
20″ 7.5-9″

What does 103W mean?

The load index 103 means that the tire has been designed to support 1929 lbs or 875 kg.

The speed index W means that the tire has been designed to be used in speed up to 168 mph or 270 kph.

This size tire is usually used on a passenger car.


Sunny is a brand of tire that is known for its quality and durability. The company has been in business for over 20 years and has a reputation for making high-quality tires. Sunny tires are made from a variety of materials, including rubber, nylon, and steel. They are available in a variety of sizes and styles to fit any vehicle. Sunny tires are a good choice for anyone who is looking for a reliable and durable tire.

Tire Specification

Brand: Sunny
Model: NA305
Season: Summer
Size: 245/45 R20
Load Index: 103 — 875 kg | x4 - 3500 kg
Speed Index: W — 270 km\h
Car Type:Passenger
Road: City
XL / Extra Load: No
RunFlat technology: No
Commercial / Reinforced: No