If you want to do it yourself. Go to the hardware store and get a bottle of leak detector liquid (Snoop). The same stuff you use on natural gas lines. This stuff WILL bubble and foam at the smallest leak. ;)

seriously !!
 

What you are describing is such a small amount of air escaping that dipping it in water will not cause those bubbles to float to the top like a normal big leak will.

I had custom made Boyd wheels made (many years ago)and I kept getting leaks. They could never find them. I told a buddy of mine that welds for a living and he found all of the leaks at the welds. Sometimes dirt ,old paint can help hold the air in a little. Scrub the rim inside and out really good. Look for the leak on the inside. You might not see bubbles float but maybe small foam forming in an area.

Good Luck !!!

Thanks guys... Yes, the leak is very small so I can understand that they dont see bubbles as you typically would. At this point, the car goes into the garage soon and i dont want to worry about constantly pumping the tire all winter... Maybe ill just roast the rears and get new ones hahaha.

i vote for roasting!!!

However if its the rim then its a waste of rubber and $$$ and youll still have the problem.

Like mentioned before go on the depth and how evenly the tyre has worn also.

Good luck with it, this would absolutly do my head in!!!!

If it was my rear tire I would be replacing both, but I have been hard on them. If you drive casually and never spin them or go hard in some turns then you may be able to just replace the one.

I vote roast them and get new ones. Rep if you video it for YouTube :tup: