Be aware that using one of those 22mm to IS disc adaptors will mean you need to up the rotor size by 20mm .This also effectively means you need a caliper for a 140mm/145mm rotor because anything else will be too big. Also the A2Z adaptor leaves quite a large gap that needs shimming out using a washer thats about 3-4mm thick.
I built this for a mate and encountered both the above problems.
Just so I'm clear, if I add this adapter...I will need a rotor that is 140/145mm in size? So a 160mm or 180mm will NOT work? I currently don't have discs on it, so I will be purchasing a new set for it. Just want to be sure I get the right size/setup.
No , what you will need if using the adaptor is a caliper for a 140/145mm rotor but a 160/165mm rotor will need to be used as the adaptor position moves the caliper further out than a normal disc mount on top of the seat stay does.
I'm sure the original setup that used the mount in the frame (like the one big.eck has) would've used the correct size rotor.
With regard to needing the caliper shimming out I cunningly fashioned one piece shims from the washers used to toe in v-brake blocks , spent an age filing bits off and checking till it was perfect (IMO)
if you need any help when you get everything just PM me .