Hi. I've been riding a San andreas for about a year with XTR V's. Recently i purchased a pair of Hope m4's. Although I seem to have a problem with the size of the rear mount bracket on the frame. Its far too small for any mount I've come across.

I was wondering whether anyone else has had a similar problem fitting a caliper to the same frame.

Heres a picture of the problem

Does anyone know of any extention mounts that'll solve the problem?