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08

Self-Inflating Tires…Soon To Be A Reality?

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Driving around on underinflated tires is just a bad idea all the way around. Underinflated tires increase a car’s rolling resistance, meaning a drop in fuel efficiency since it takes more energy to move the vehicle down the road.

A single tire that’s down by ten pounds of air means a 3.3 percent drop in fuel economy…multiply that by all four tires, and you can figure on giving up ten percent of your gas mileage. The added friction and rolling resistance also means more heat is generated, and heat is the enemy of the internal structure of a tire. That heat will damage a tire to the point of failure. Studies show that underinflated tires are a full 25 percent more likely to fail, and at least half of one-car accidents involve a tire problem as a factor. And still, it’s estimated that 60 to 80 percent of the vehicles on the road are rolling on tires that are low on air.

The tire pressure monitoring systems on newer cars are all well and good, but what can be done to stabilize tire pressure in vehicles, especially when many drivers just ignore it?

Self-inflating tires are on the horizon. For military vehicles and heavy trucks, self-inflating tires have been around for a while, but they always involved a compressor or air reservoir on the vehicle to supply air. There are now a couple of new, innovative designs for self-inflating tires:

  • A system from SIT uses a tube chamber near the bead of the tire wall. At its lowest point, the tube is kept closed with the normal deformation of a tire due to the weight of the vehicle. The portion that’s squeezed closed constantly changes as the tire rolls. If the tire pressure drops, sensors and an automatic pressure regulator kick in and the squeezing/releasing action of the tube begins to suck in atmospheric air. When the tire reaches its proper pressure again, a check valve prevents the tube from introducing any more air. The SIT design actually won the 2009 Tire Technology of the Year award at the Tire Technology Expo.
     
  •  A system designed by Halo uses a pendulum-type mass that’s suspended at the center of the truck wheel. As the wheel rolls, the pendulum swings and drives a self-contained pump which adds air until the desired air pressure is reached. This five-pound unit mounts directly to the wheel’s axle cap, not unlike a hub odometer. While it’s currently only available for heavy trucks, buses and tractor-trailers, the Halo system has been tested for over 8 million miles on various vehicles.

While these self-inflation designs may not be widely used yet, they point the way to a time when having to worry about tire inflation will be a thing of the past. What kind of shape are your tires in? Have you checked their inflation level lately? Give us a call and make an appointment at the shop and let us have a look at your tires!

Categories: Tires 101 | View Count: (54) | Return

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Tire installment package required for online only. Goodyear Credit Card offers are subject to credit approval. Get up to $100 back by mail-in or online on a qualifying purchase of a set of 4 select Goodyear tires with any form of payment method; plus get an added bonus of up to $100 more when the purchase is made on Goodyear Credit Card from 10/1/2024 to 12/31/2024.

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Limit one (1) rebate per qualifying tire purchase. Limit four (4) rebates per household, per promotion. Tire rebate offers are on a set of four (4) tires purchased from 10/1/2024 to 12/31/2024. If your vehicle requires six tires, rebates are available on a prorated basis for the two additional tires. The prorated rebate amount, per additional tire, is 25% of the rebate amount listed above. The minimum purchase is a set of four tires, and the maximum purchase is six tires per invoice. Complete purchase must be made on the Goodyear Credit Card to receive maximum rebate offer. Offers available only at authorized participating U.S. Goodyear retailers and websites. Offer valid only for U.S. residents who are individual consumers with mailing addresses in the U.S. and U.S. territories. Offers valid for consumer accounts in good standing. Not valid on previous purchases. Cannot be combined with other Goodyear tire rebate offers. Base portion of rebate offered by Goodyear, and bonus portion of rebate offered by Citibank, N.A. The Goodyear Credit Card is issued by Citibank, N.A.

Completed rebate forms must be postmarked or submitted online no later than 1/31/2025. Invoice must have eligible tire name and proof of purchase on Goodyear Credit Card (when applicable) clearly indicated. Online purchases must include copy of the online purchase invoice and the installation invoice from authorized Goodyear retailer. Allow 6 to 8 weeks for Visa Prepaid Card/Virtual Card delivery. Goodyear reserves the right to substitute a check of equal value in lieu of a Visa Prepaid Card at its discretion. For additional questions, or to check the status of your rebate, you may visit www.Goodyear.com/rebates or call the Goodyear Rebate Customer Service at 1-888-683-8724 Monday to Friday between the hours of 9 a.m. – 9 p.m. ET and 9 a.m. – 5 p.m. ET on Saturday. Fraudulent submissions will not be honored and may be prosecuted. Sponsor is not responsible for noncomplying rebate submissions or for lost, late, illegible, postage-due or undeliverable mail. Noncomplying rebate submissions will not be honored, acknowledged or returned. Void where taxed, restricted or prohibited by law. All decisions made by Goodyear (or its authorized representatives) relating to the validity of any submissions are final and binding. This promotion is subject to all federal, state, and local laws and regulations.

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