Can only find I.S

http://www.ebay.co.uk/itm/Shimano-Bicycle-Bike-Disc-Brake-Post-Mount-to-Post-Mount-Front-Adapter-180mm-/360910427258?_trksid=p2054897.l5659

But that’s a front one, will it work for the back too?

Says suitable for front disc brakes only.

The hope version (adaptor H ) for 183 says it is OK for front and rear 160mm post fitting. I would guess that means the shimano one is also suitable?

mudmonster – Member
But that’s a front one, will it work for the back too?

Post is post – front or back makes no difference, any +20mm Post to Post adapter will sort it.

So to run a rear 180mm disc I need to get a front 200mm? or 203mm adaptor?

Your frame is most likey 160mm post (runs a 160 disc without adapter)

So for a 180 disc you want a +20mm adapter (160 to 180).

I use this

http://www.chainreactioncycles.com/ie/en/shimano-xtr-mount-adaptor-front-post-180mm/rp-prod54881

Ok great, thanks that’s the one I’ll get 🙂

Had the same problem with Abigales Enduro. Fitted a same size XT front adaptor to the rear. Works a treat