I have a RHD 89 Defender. I got a flat on the front right Monday. I changed it to the full sized spare and drove on. I have not found anything wrong with the tire that went flat, nails, cuts , etc. This morning while heading to the tire shop I got another front right flat! With no good spare I had to call for a tow. The tire shop says they see nothing wrong with either of the tires. Has anyone seen anything remotely like this before? I originally thought maybe a bad seal or rim damage on the first flat but now 2 with in 20 miles or so is making me scratch my head. Any advice would be greatly appreciated!