At 17:38 21/02/2006, you wrote:
Aren't towballs still 2" dia?
Haven't been for about 20 years, though the difference is not obvious
to the naked eye between the new size 50mm and the old 50.8mm (2").
To make it easier, 50 mm balls have a flat machined on the top, about
12 mm across - so if your towball has a flat top it is 50
mill. These will fit - loosely and less securely - in a 2" hitch so
make sure you have a good safety chain if you do this. A 2" ball is
"very" snug in a 50mm hitch, but there are still 2 serious risks: (a)
it will not in fact be properly on and may come off, or (b) it will
be much harder to get off when you have gravity working against you.
As for electrical connectors for lighting etc wires, they are all
made by Utilux (or Repco-style copies) but the flat plastic one about
50 mm x 10 mm with the centre pin raised above the line of the others
is the Australian Design rules standard that will be fitted to a new
vehicle by default. They seem to last about 5 years unless you drive
with the trailer plug not properly in the socket (or run over
something that rips it out), or you drop the rear of the car onto a
bank or gutter. The metal ones were more robust, but just as prone to
scuff on the road if they fell out, and there were 4 or 5 different
types and sizes and several adaptors formed part of a well-prepared
pilot's kit. Non-standard wiring - or different standards in
different States - was a perennial problem.
I must be getting old - I haven't had 2" balls for years!
Wombat
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