Bill, You probably have natural rubber Mil Spec Tubes.  A few years ago Michelin
came out with a butyl rubber aircraft tubes that hold air much longer and
now several mfgs offer them.  Check Desser Tire  http://www.desser.com Steve Colwell  Legacy


 
Subject: [LML] L-IVP Tire/ Tubes

All 3 of my tires lose about 5 lbs of air per week.  This has been happening since day one.

At 150 hours, its time to replace the original tires.  Should I replace the tubes as well??

Thanks, Bill Hogarty