anyone know the size of the back tow hook tread size.The front and back are different sizes

News to me. I only have one tow hook (hinge) #72157184971, it's been used although not while I owned the car so can't verify it fits both front and back.

I found it odd myself but my 2012 are different sizes, front works with tow hook supplied by mini but the back?????????????

A quick search in the Countryman forum found a number of threads discussing the tow hook. This one might help

Thanks Mikey_T, I did see that but again two different sizes lol. Heading to Mini tomorrow to find out why the tow hook they put in the bag does not work.
will also check into the M20-3