In preparation for buying our first caravan - we are almost there!!- we have booked our new shape Honda CRV into the local Honda dealer to have a detachable towbar fitted next week. (Their price was almost the same as local towbar specialists. ) Reading another query has made me wonder are all towballs the same sizes - ie would it be compatable with an Alko hitch as well as a traditional hitch/ coupling? Sorry for what might seem an ignorant question from a novice. Thanks.