Originally Posted by
J8TRO
Right, i've been in the garage for ya Phil
My larger disks (old set up and I presume from the 21) which work with the standard caliper have a dimension from the face of the disk to the face of the wheel mounting of 18mm (see first pic). The disks to go with the Hi Specs have this measurement as 22mm (see second pic on the car).
I have taken a picture of the caliper where the disk rotates through. When i first installed the caliper, i too thought my old disks would be OK, however as you look at this picture, the disk was not central and was more to the right (front) of the caliper and therefore incorrect. I presume this is the problem you have, and would make sense with the 4mm difference
If you do a search, i remember reading through the slagging off of high spec brakes that someone had sourced the correct disc instead of paying hi specs prices, however they needed to get the spigot hole made bigger. I'll see if i can find it.
Also if you look on my "Your my Boy Blue" thread, the first pic is with the old disc, and a picture further down is the hi spec disc. Mine don't have elongated holes at all.