Tubes go flat because something punctured them. That's where the detective work starts; figuring out what caused the puncture. Simply replacing the tube does nothing to remove the actual cause of the flats. In addition to the others' questions, we need more info:
1. your weight
2. size of tyres
3. pressure used in tyres
Last edited by DannoXYZ; 09-18-10 at 01:04 AM.