reminds me when I bought a hybrid with double walled aero rims there were access holes in the wall that the tube made contact with. as bought, w low pressure, wide, hybrid tires, standard rim tape was fine. when I switched to high pressure narrow road tires I had two flats one right after the other, due to the tube pushing thru the access holes. after the 2nd flat, figured out what was happening & I added the rim tape I had been carrying & I was all set. the front didn't flat I guess cuz most of my weight was in the rear. I think I eventually added better rim tape up front too