I’m going to start this post with a true story. Recently my dad experienced a puncture on one of his rear tyres after going over a rather large nail. He wasn’t too worried, he always carried a spare in the boot so knew that he could change the tyre and carry on his way. However, when he got to the boot and looked at the spare, he realised that the spare tyre was also flat, that he’d taken off this tyre on another occasion when it had been punctured, and had forgotten to get it sorted. He ended up calling our the RAC, and had a rather long wait into…