Slime or not to Slime, that is the question!

Why do you assume that? No one else is having problems with losing air from stock alloys. More likely you have either bad valve cores or punctures. Take a tire off the car and paint it all over with soapy water--the fix will suggest itself once you find the leak.

I have used slime for my mountain bike tires for over 12 years. The stuff really works. I used to get flats all the time but slime cut that to 1/20th of the frequency. As far as cars go? I can't help you on that one.

BTW, I never noticed any off-balanceness of my mb tires but you do have to put the slime in then rotate the tire to get a good, even coating on the inside.

I'd replace the tires before I put any goop in them. If the rim isn't damaged, they should seal without any goop.

Before I pull 3 out of 4 tires off to "fix" and not take care of the problem again, I will buy 4 new tires which would have been needed sometime in the future anyway. The valve stem was changed on the twice "fixed" wheel, not to say it might not still be the problem. I didn't think the Slime idea would be a good one for cars, but I thought I would ask. Thanks to everyone for the replies!