Originally Posted by
merlinextraligh
Carefully inspect the tires to find out what's causing the leak. Finding the hole in the innertube (using water as described above) and correlating that to the tire will help in finding what's causing the problem.
Slow leaks like yours can be frustrating because the cause is not always obvious. Good canidates are tiny glass shards or fine wire (from radial car tire belts). These can hide in the tire tread and just protude enough to make a tiny hole in the innertube, that will slowly leak out.
Agreed. I've had this several times. First time I did it, I found a small wire poking through the tire. My finger bled for quite a while. Now, I carry a cotton ball in my bag. It does a great job of finding small sharp objects and I haven't been cut since.