Balancing wheels

Tyre Fitter

Ive just picked my caravan up from dealers after having some warranty work done & I thought I would take it straight to my tyreshop & get the wheels balanced,,i was surprised how much weight they needed to balance them,im surprised they caravan cupboard
doors haven't dropped off with the vibrating going through the van.I think they should be balanced from new at factory because we the customer doesn't know how much vibration is going on in the van when we are towing it.

Andy.