Originally Posted by tiowen
Yes my tires are RFTs. Are these common on Run flats?
No, they are no more common than on conventional tyres. It's just that if the RFT sidewall is punctured/damaged in any way, the tyre cannot be repaired.
As others have suggested there could be other causes for the leak (including cracked rim). You should have it inspected at a tyre shop ASAP.