I was losing air, about twenty pounds a week or more. I placed the tube (inflated) in water and could not find any leak. I changed tubes, my LBS caries Sunlite tubes. They are very small in dia. like for a road bike. I have 700X35 tires. I still get that twenty pound a week or more loss. I am going to replace the rim tape (three months old) tomorrow with another tube. This is only experienced in the front tire. The back tire gives me a loss of about five pounds a week.
Any opinions on what is wrong, or is this normal? I ride a Connandale H400.