SID V Brake Post Mount Size

[BigTom]

Hi. I've got a 2005 Rock Shox SID Team fork that I've recently aquired. I want to use v brakes on it, but unfortunately, it did not come with the post mounts, so I'm trying to find some. I picked up a couple different ones from my LBS, but none of them fit (I didn't realise there were so many different sizes for post mounts!). Does anyone happen to know what size this fork takes? I've looked online, but can't seem to find it. The closest I found was a technical manual from Rock Shox, which says M6, but on the diagram it is pointing to the front of the mount, so I believe that is the bolt size required to hold the v-brakes on, not the size that goes into the fork? Can anyone help???