How to Identify the Correct Side of a Tire

[MaxAnn]

Tires are divided into three main categories based on their tread patterns: symmetrical tread, asymmetrical tread, and unidirectional tread. The methods to identify the correct side are as follows: 1. Unidirectional tread tires: These can only be installed in the specified rolling direction. Both sides of the tire are marked with arrows indicating the correct rolling direction. Therefore, when installing these tires, simply ensure they align with the rolling direction. (Note: There are rare cases of unidirectional asymmetrical tread tires, where the OUT-SIDE marking on the tire sidewall should be observed.) 2. Asymmetrical tread tires: To distinguish between the inner and outer sides, manufacturers mark the sidewalls with IN-SIDE and OUT-SIDE labels. OUT-SIDE indicates the "outer side," which is the visible side when installed. Install the tire according to this principle. 3. Symmetrical tread tires: These tires do not have a specific inner or outer side, nor do they have a correct or incorrect side. However, for easier management of tire lifespan, it is generally recommended to place the side with the tire production date facing outward. This allows for easy observation of the manufacturing date and estimation of the tire's lifespan.