I recently had a double blow out whilst travelling in Spain with my single axle Elddis Crusader Typhoon . The tyres were 4 yr old Hankooks with good tread, and no cracks. The treads appeared to have delaminated from the tyre body, causing a lot of damage to the van bodywork. I contacted Hankook on return to the UK, and was told it was a known fact that tyres over 60psi must be replaced after 3yrs regardless! Having studied the technical section of the Caravan Club handbook, the only advice is to check tyres after 3 yrs and replace after 5 yrs. When I phoned the club, the tech adviser was somewhat dismissive and said it was a problem and that the cause is not yet known! My local caravan repairer, who quoted for the bodywork damage £1800!! said that two other customers with large single axle Abbey vans had had similar blow outs. Are there other owners out there who have had similar trouble?