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Tyres blow out all too common on caravans & trailers; the main problem being that they sit, under load, in the same place for extended periods of time.

Simple checks are relatively easy to do;

- Check the date of manufacture stamp on the tyre sidewall; its 4 numbers, a week number then a year. 5 years old is the recommended maximum.

- Check that the maximum load index on the sidewall is at least 200kg (my rule) over half the MTPLM of the caravan. This gives piece of mind, and a factor of safety. I only ever buy 8 ply tyres also; belt and braces approach, and lets face it, van tyres are not expensive for 5 years life. When we bought the caravan, I noticed that the spare was quite a low rating; turns out to be from a Renault Clio sized car, not a caravan tyre at all.

- Before setting out, check the pressure in the tyres. For a single axle Daystar, I would say around 55-60 PSI; although, it will be on the tyre sidewall or in your manual. Fill up as soon as possible if a little low.

- Take it easy over potholes, speed bumps etc. The tyres are under twice the load of car tyres, there being only 2 of them.

- When you pull up somewhere after a long drive, have a quick feel of the sidewall. They should be warm, but not hot, evenly all the way round, with no obvious grow outs (or Egging)

- Keep an eye on the colour & condition of them; aging and cracking will show itself very quickly.

  Stick to this simple list, you should be fine.

I would also have a very stern conversation with said seller; if it was a dealer, maybe email Trading Standards if you dont get anywhere.