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Old 08-02-2013, 01:40 PM
Anfänger Anfänger is offline
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Location: New York
 
Join Date: Sep 2011
Posts: 69
Mein Auto: 2013 X3 35i
TireRack's tech statement on repairing run flat tires explains that some manufacturers (e.g., Pirelli) do not endorse repair of their RFs, while others provide guidelines that permit some repairs. TireRack's own position is this: Tire Rack will not repair any run-flat tires that have been driven in a severely underinflated or zero pressure condition because the service conditions they experienced and integrity of their internal structural cannot be confirmed.

Bridgestone's guidelines say: It depends on how far and at what speed the car was driven after the puncture was sustained. Repair is possible only if deemed so by the tire sales store. Preconditions include a puncture of less than 6mm for both side-reinforced type and support-ring type Run-Flat tires, plus minimal damage to the support ring in case of the latter. However, it is strongly recommended that the tire is replaced as its durability will have been weakened after being repaired.

So the keys are: 1) know the policy of your tire manufacturer; and 2) respond to TPMS warnings before the tire deflates much. There should almost always be sufficient warning to save the tire. e.g., note that TPMS is mandated in new cars because industry data has revealed that slow leaks account for more than 85% of tire deflations.

But you might still want to consider tire and wheel insurance. There will always be some degree of uncertainty, and some drivers will not feel safe with a repaired RF. BMW will certainly recommend replacement, and many tire shops refuse to consider repair. Yes, you can find cheaper tire insurance from independent tire stores, but there is still the concern that potholes in some cities are bad enough to damage the wheel as well as the tire.

Last edited by Anfänger; 08-02-2013 at 01:56 PM.
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