Yesterday I was driving down the A1 just to the north of Newark on the way to see my grandchildren and was in the process of overtaking a line of about 6 lorries travelling in convoy (as they do) The lead lorry was about a lorries length in front of the second when one of the tyres on the lead lorry disintegrated and the band of rubber with the tread parted company from the carcass. The rubber then hit the centre reservation and bounced back into the gap between the lead and second lorry only to reappear from under the 3rd lorry and hit the central reservation and fall back into the road. This part of the A1 is only 2 lanes wide and was now on a slight left hand curve, I had no where to go and hit the rubber ring at about 55 mph. (I had been travelling around 65mph). and when it reappeared I was no more than 25 feet away I could not brake because of a 4x4 on my tail. There was an almighty bang when my car passed over the rubber ring and likewise with the 4x4 behind. Needless to say the lorry didn't stop. I pulled over as soon as I could but luckily the only visible damage was to a piece of plastic which was fitted between the side if the engine and the bodywork and to a mud deflector on the bottom of the front valance. If I had been just that bit closer it might have been a different story. I am with Greenflag so called them to check the integrity of the car and they gave it the all clear, but for a few seconds it was a pulse racing situation!