Have you ever wondered what those short hairs are for? While many have theorized that they serve as an indication of tire wear, some believe that they are used for noise reduction or air ventilation, but this is not the case. Actually these hairs do not serve any purpose after production.
They are simply a by-product of the tire manufacturing process. Let us tell you that their technical name is vent sprue, but they may also be called sprue nubs, tire nibs, gate marks or nippers. Apart from the purpose of these tiny hairs made on tyres, there are many myths about them, which are prevalent among the people.
The most common myth is that you need to remove them or that they should never be removed. Explain that rubber hairs are created during the manufacturing process. To make the tyre, rubber is injected into a tire mold and air pressure is created to spread the liquid rubber into all nooks and crannies.
There is a risk of air bubbles forming between the rubber and the mold during the use of heat and air. In order to ensure that the rubber completely fills the mold, air needs to exit through the small pockets. To do this small vents are made in the tire mold, allowing the rubber to penetrate each pore.
When this happens, even tiny bits of rubber pop out of the vent hole. These tiny bits of rubber stick to and stay attached to the tire even after the mold is removed. That’s what those little rubber hairs made on tyres. These hairs are usually removed from the part of the tire that comes into contact with the ground.
But companies do not remove the rubber hair on the shoulder and sidewall of the tire. Although they serve no purpose in the performance of your tyre, having them lets you know that the tire is new. These rubber hairs are removed from used tires for some time.
This is because these tires wear out with regular use. Although many people remove it, there is no practical reason to remove them. The decision to do so is purely a matter of keeping the tire looking its best. If you want to remove them from your vehicle’s tires, grab them by hand and pull them.