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      12-25-2007, 08:29 AM   #1
d3syd
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Run flats repairable?

Hi Guys, just wondering if run flats are repairable after a puncture or do we need to replace them whenever we get a puncture. If this is the case it punctures suddenly got VERY expensive....

Reading the BMW web site touting the benefits of run flats, this appears to be the case:

"Once home, you can call a tyre retailer, your BMW dealer or BMW 24 hour Roadside Assistance to arrange to have your flat tyre replaced at your convenience."
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      12-25-2007, 08:43 AM   #2
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They are replace only, sadly. I had one go down in my 335i.
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      12-25-2007, 08:52 AM   #3
d3syd
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Ouch, that will make punctures very painful to the wallet! I hope they are then more resistant to punctures.

What happens when one was to get a puncture when the tyres are 3/4 worn, you then end up with one new tyre and 3 worn tyres. Surely this is not the optimum in tyre safety?!
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      12-25-2007, 09:53 AM   #4
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I've had 3 punctures in the tread of my runflats, and went to replace them on the first two times. Two separate tire shops said "why replace them? these are easily repairable". I've had no problems with any of the three repairs.

If you get a puncture near or on the sidewall, you'll have to replace the tire, just like with non-runflats.

Btw, Bridgestone recommends replacing, for obvious reasons. :smile:
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      12-25-2007, 01:58 PM   #5
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The issue is really how long and how fast you ran on the "run flats".

Even if the hole is repairable, the sidewalls may have overheated with all the additional flex and weight on them. Heat kills tires. Flexing produces heat.

I'm not a big fan of run-flats, because the only way to really save them so they can be repaired is not to run them when they are flat.
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      12-25-2007, 02:01 PM   #6
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If you check on Tirerack.com you will see posts from people who own runflats and have had them repaired.
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      12-25-2007, 06:46 PM   #7
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To save the cost of replacing them, I think I will carry an air compressor and keep pumping them up at the first indication of pressure loss, then get to a tyre repairer ASAP or repair them myself.

I live in rural Tasmania 90 miles from town. Added safety against blowouts - yes, added convenience - definitely no.
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      12-26-2007, 07:54 AM   #8
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When I used to have Runflats on the MINI, I had punctures repaired twice on 2 different tires with no noticable effects.

Hopwever, since the older pressure sensing systems only inferred pressure by measuring rotations per mile (or whatever distance the computers use) and therfroe could calculate tire diameter, they were not always reliable at notifying you quickly, so I can see some merit in the replacement argument if you drive lots of long distances at higer speeds. At the time, I was driving all short trips less than 5 miles, so I could not see how the tires could get that heated, so I went for it.

The newer systems are supposed to be much better so I would say it is even more safe to have a repair done.
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