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Note the technical term for what you are calling "hairs" is "vent spews."[1] As the name indicates, they are a consequence of an important detail of the tire fabrication process.

While liquid rubber is being injected or otherwise forced into the tire mold, air bubbles can form in the rubber or between the rubber and the mold. These bubbles can cause the finished tire to be weakened or malformed. To prevent that, tire manufacturers place vent holes in the mold to allow the air to escape under pressure. Necessarily, some rubber will get forced into these holes, forming the vent spews upon curing (which is the process by which the tire rubber converts from liquid to solid).

These vent spews serve no useful purpose; conversely, they can be removed without consequence.

[1] for some citations, see this ask.com post and this reddit post

Note the technical term for what you are calling "hairs" is "vent spews."[1] As the name indicates, they are a consequence of an important detail of the tire fabrication process.

While liquid rubber is being injected or otherwise forced into the tire mold, air bubbles can form in the rubber or between the rubber and the mold. These bubbles can cause the finished tire to be weakened or malformed. To prevent that, tire manufacturers place vent holes in the mold to allow the air to escape under pressure. Necessarily, some rubber will get forced into these holes, forming the vent spews upon curing (which is the process by which the tire rubber converts from liquid to solid).

These vent spews serve no useful purpose in the finished tire; conversely, they can be removed without consequence.

[1] for some citations, see this ask.com post and this reddit post

They serve no purpose on the finished tire, but they are a consequence of a very important detail of the fabrication process.

While rubber is being injected or pressed into the mold, there are risk of air bubbles forming between the rubber and the mold, which can prevent the rubber from getting in all the intricate patterns of the mold, thus producing malformed tire.

That's why the mold has vent holes that allow air to get out. A little rubber gets squeezed into these holes and that is what causes these "hair".

These hairs have no useful purpose as long as riding concerns, so they can be removed with no consequences.

Note the technical term for what you are calling "hairs" is "vent spews."[1] As the name indicates, they are a consequence of an important detail of the tire fabrication process.

While liquid rubber is being injected or otherwise forced into the tire mold, air bubbles can form in the rubber or between the rubber and the mold. These bubbles can cause the finished tire to be weakened or malformed. To prevent that, tire manufacturers place vent holes in the mold to allow the air to escape under pressure. Necessarily, some rubber will get forced into these holes, forming the vent spews upon curing (which is the process by which the tire rubber converts from liquid to solid).

These vent spews serve no useful purpose; conversely, they can be removed without consequence.

[1] for some citations, see this ask.com post and this reddit post

They serve no purpose on the finished tire, but they are a consequence of a very important detail of the fabrication process.

While rubber is being injected in the mold, there are risk of air bubbles forming between the rubber and the mold, which can prevent the rubber from getting in all the intricate patterns of the mold, thus producing malformed tire.

That's why the mold has vent holes that allow air to get out. A little rubber gets squeezed into these holes and that is what causes these "hair".

These hairs have no useful purpose as long as riding concerns, so they can be removed with no consequences.

They serve no purpose on the finished tire, but they are a consequence of a very important detail of the fabrication process.

While rubber is being injected or pressed into the mold, there are risk of air bubbles forming between the rubber and the mold, which can prevent the rubber from getting in all the intricate patterns of the mold, thus producing malformed tire.

That's why the mold has vent holes that allow air to get out. A little rubber gets squeezed into these holes and that is what causes these "hair".

These hairs have no useful purpose as long as riding concerns, so they can be removed with no consequences.