Tony,
The link is really usefull, thanks. I have just had my caravan serviced and been told that both tyres have a manufacture date of 1989, despite the caravan being a year 2000 model. I had only bought the van in late 2006 from a 'reputable' dealer. I must admit the tyres do not look 20 years old, the sidewall is just starting to deteriorate, so I'm going to get them changed before the next outing. Does anyone have any preferred tyre manufacturer? I currently have Hancook tyres.
Thanks,
Steve