May be an old question I could not find, but I am hoping to find answers to help with problem.
I cannot keep tires inflated. I will inflate to recommended pressures before my ride and within 24 hours they will be either partially or completely flat.
I have 700x25 with 60mm presta valves.
I have tried 2 different brands of tubes ... Nashbar and Bontrager. I have tried "normal" weight and ultralight weight tires. Both me and the local LBS have installed new tubes.
The bike and wheels are only 3 months old.
An suggestions? Ideas?