A couple of days ago I noticed some slight bulging on the sidewalls of one of the Coopers, and on closer inspection I found slight bulging on three out of five. It isn't very noticeable, but if you run your hand around the tyre you will feel it straight away. I took it straight into Tyre Power, the local Cooper dealer, who inspected them and said it was normal. He said that they have a band in the carcass where there is a join of some sort and that a slight bulge can often occur. Does this seem like a legitimate explanation and are these tyres still safe?

A mechanic mate says hell no. I have just inspected my BFG KM2's and there is nothing of the sort on them.

Any advice?