Seems very strange why you want to know when your caravan,if it's yours, has at least 2 complete wheels, 3 with a spare, each wheel having the size details on the tyre. An explanation of the need to know would help.
Re the jack...er hang on it's coming it's nearly clear oops it's gone but it seemed to be a picture in my mind of around 5 different types.... sorry picture on your jack in my mind has gone.
Clair Voyant
April 2009