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Tire Service Blog

Valve Stems!

Sure we know that all tires have valve stems, but what are, why do they leak, how do they work?

The valve stem is a small rubber stem that can be found on the inside of rim that the tire is wrapped around.  The valve moves in and out of place with air pressure.  An air tank with pressurized air will push the valve inward, filling up the tire.  Once enough air pressure is inside the tire, the force will push the valve outward creating a seal so air doesn’t rush out causing the tire to go flat.

The valve works off tension created by a spring inside the valve.  Air can only enter the tire of the pressure applied to the valve is greater than the pressure on the inside of the tire.  The valve has a nub that is compressed inward during inflation.  When the tire is over inflated, air needs to be released from the tire.  This is done by depressing the nub.  You can find the top of a tire gauge has a little button shape that can be used to depress the nub.

While we’re on the topic, it’s important to keep a cap on the valve stem. This prevents dirt and other contaminants from entering the valve stem and creating an opportunity to depress the nub.

So like always, check you pressure regularly and stay safe on the road! 

If you would like for us to cover a particular topic or have a question about tires or auto care, submit your request/questions here, and if we choose your submission in our blog, you’ll receive a free oil change!

Free oil change will be given once monthly to the person that submitted the question that’s answered in the blog.  No purchase necessary.  Must be 18 years or older and a licensed driver. Not valid with any other offer. 


Written on Tuesday, May 13, 2014 by
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Bowen Tire is a pillar of the Owensboro, KY community. Bowen Tire is a leader in offering name brand tires, wheels, auto repair and brake services for customers located in and around the Owensboro, Kentucky area. Our goal is to focus on customer service. It is the foundation of our business. Bowen Tire employs a well-trained staff specializing in the sale and installation of passenger car, performance and light truck or SUV tires. Custom wheels are available at Bowen Tire. Special wheels and rims compliment any tire or customer vehicle. Complete under-car services, such as oil changes, brakes, shocks, struts, alignment, and transmission fluid flush for both foreign and domestic vehicles are readily available at competitive prices. Take this opportunity to browse Bowen Tire website or call us for personalized service.

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Owensboro, KY 42303
Phone: (270) 686-7540
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