Flat tires–pros and cons

Run flat tires–good or not?
Experienced mechanics share their insights in answering this question :
To some extent, it’s good because you can drive different ways on them, but that’s only around 50 miles or something. But, if you consider the cost, if you have to get the flat fixed when they go bad, they cost 100-something bucks at most places to fix them. My neighbor [ran flats](https://www.yourmechanic.com/article/is-it-possible-to-repair-a-flat-tire0 on a Mini. She gave up and bought regular tires. She had so many problems with the flats. I really don’t think they have the technology down pat on those things.

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Run flats can weigh more, decrease ride comfort and handling and are less readily available. Some consumers contend they also wear faster and less evenly than conventional tires. And because of the possible increase in weight, the tires can reduce fuel economy.
You don`t have to replace the tyre immediately. You don`t have to keep a spare wheel in your car. You save weight since there is no need for a spare tyre or wheel changing equipment thus, making your vehicle more fuel efficient. Run flat tyres withstand mechanical damages better.
Not only does driving on a flat tire dangerously decrease your vehicle`s handling, it may cause structural damage to the wheel, brakes, alignment, and potentially other components like your suspension and steering system.
When punctured, run-flats may offer safer handling than regular tires. A run-flat tire will continue to support your vehicle`s weight after a puncture for a limited distance thanks to its reinforced sidewalls, while a regular tire will not.
Many manufacturers strongly advise not mounting tyres of this type on standard rims, because these tires do not guarantee their stability after a puncture. We should also remember that the car should be equipped with a tyre pressure sensor system (called TPMS).
The Benefits of Tire Training

Tire Flipping is also a great way to work the posterior muscles, like your hamstrings, glutes, and back. Also, this a terrific exercise for your core muscles.

Some 11,000 accidents occur every year due to bad tires, according to the National Highway Traffic Safety Administration (NHTSA).
If safety is the priority in your tire selection criteria, then tires equipped with run-flat technology ;may be for you. Run-flat tires allow drivers to travel approximately 50 miles at 50 miles per hour or less to reach a safe location after a tire sustains complete air loss due to a puncture or cut.
BMW considers run flat tyres to be safer than standard tyres due to increased stability of the vehicle following a puncture. This is due to the hardened sidewall still supporting the flat tyre.
This is because original Mercedes-Benz tires feature run-flat technology. This means that original Mercedes-Benz tires feature reinforced sidewalls that prevent your tire from losing all of its air in the event of a puncture. In the event of a flat, you won`t need us to tow you, and you won`t need to put on a spare.
In order to keep you moving without air pressure, run-flat tyres are designed with a reinforced sidewall to try and keep the shape of the tyre with the car`s weight on top of it. This means that the rubber won`t “give” as much, and will be able to keep its shape a lot better than regular tyres.
Tires with the runflat tire technology last as long as regular tires do. Namely, the average lifespan for run flat car tires is about 50,000 to 60,000 miles. External factors such as road conditions, driving habits, car problems, and air pressure levels, can greatly shorten tread life.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I hit a curb going about 20-30 mph while turning and got a flat tire. While getting ready to change the flat and put a doughnut on
ANSWER : Hi There,
It may be difficult to tell what the light colored fluid could be as there are a number of fluids in the vehicle that serve various purposes. It may be likely that the light colored fluid may be brake fluid if one of the brake lines was damaged. It may also be possible that trying to move the vehicle with the emergency brake set could have damaged the emergency brake by the force of the vehicle moving. I would suggest having a professional from YourMechanic come to your location to take a look at the vehicle.

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Tires easily go flat when hit curbs at slow speed
ANSWER : The angle at which the impact occurs is more important than the speed at which the impact occurs. The tire will lose air if the angle of the impact shifts the tire off of the rim bead.

Another possible cause is damage to the tire. All tires are different. Different manufacturers and different tire models all react differently to impacts and undulations. Resulting damage can vary, and if you just happen to have tires that react poorly to the curb conditions, it can cause blowout where similar impact to your friend’s tires do not cause blow out.

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When I go to use fix-a-flat I can hear my tire deflating more
ANSWER : First of all, fix-a-flat is to be used as a backup to using a good spare tire. If you add the fix-a-flat to a leaking tire, you should follow the directions on the can to add the liquid to the tire. Some types want you to turn the can upside down and others want you to put the can right side up before pushing the nozzle.

If you are using the can correctly, then the liquid is pushed in to the tire and then the air in the can will go into the tire to give you enough air to get to a service station to get the tire fixed. Get the tire fixed as soon as possible. If the can of fix-a-flat can is bad it may have leaked out all the pressure before you used it and will not work to fix the tire.

Read Full Q/A … : Flat tires–pros and cons

Flat tires–pros and cons
ANSWER : To some extent, it’s good because you can drive different ways on them, but that’s only around 50 miles or something. But, if you consider the cost, if you have to get the flat fixed when they go bad, they cost 100-something bucks at most places to fix them. My neighbor [ran flats](https://www.yourmechanic.com/article/is-it-possible-to-repair-a-flat-tire0 on a Mini. She gave up and bought regular tires. She had so many problems with the flats. I really don’t think they have the technology down pat on those things.

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I took off from a stop sign felt like something stuck and than sounded like i had a flat tire. Now it’s making a loud Thumping in 2014 Kia Sorento
ANSWER : Hello – this issue (or issues) may be a combination of multiple problems. The "stuck" issue at the stop light may be a brake not releasing when you take your foot off the brake pedal. The thumping noise once you started moving again could be a broken component in the brake system on one wheel that is catching each time the wheel revolves. It could also be a tire with separating tread – may still be holding air, but the tire is coming apart. I would recommend a tire and brake inspection](https://www.yourmechanic.com/services/car-is-shaking-or-vibrating-inspection) immediately by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs. This does not sound like a safe situation!

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Car vibrates/shakes at 55 mph
ANSWER : Hello. It sounds like there is a bent rim on the SUV. The tire may slowly lose air if the the rim is bent because the tire is not able to seal properly. A bent rim may also cause the SUV to shake at higher speeds. When this happens the best thing to do would be to replace the rim(s) that are bent.

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Replace run flat tires
ANSWER : If you have run flat tires on your 2011 BMW 328 xDrive and that is your only restriction, then yes, you can only buy one tire and get away with it. If your vehicle is an all-wheel drive, you would need to replace all 4 tires. It is common for tires to be replaced at least in pairs, but if you don’t have to buy more than one tire most will not. The reason that all-wheel drive vehicles must replace all tires is that different tread depths all around the vehicle can have an affect on wheel speed, and therefore the computer can get very confused and possibly damage the transmission. Unless your vehicle is all-wheel drive, I would recommend just buying one tire with only 40K on all the other tires.

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What should I know about run flat tires?
ANSWER : If your car is equipped with run flat tires, you have an important advantage over those without this technology. Run flat tires are designed to be used even if they’re punctured, which means you don’t have to pull over and install a spare tire. You do still have to have the tire replaced, though. Here are some other important tips for using run flat tires:

Don’t drive more than 100 miles with a flat tire.
Don’t exceed 55 MPH with a flat tire/run flat.
The tire pressure light will still come on if you have a flat or low tire pressure with a run flat tire.
If you’re not sure you have run flat tires (RFT), check the sidewalls for either “RFT” or “DSST.” Both of these denote a run flat.
If you have run flat tires on your car, you will NOT have a spare.
If the exterior temperature is very hot, you cannot drive for 100 miles on your run flat. Have the tire replaced as soon as possible and limit your driving.
You will notice a difference in handling when driving with a punctured run flat tire as opposed to an inflated tire.
Run flat tires cannot be serviced by all automotive service providers.

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