I bought some shimano 615 brakes which are post mount (I think)! My bike and forks are IS (the older version).

Can anyone help me please with what adaptor mounts I need?

Thanks in advance!!

What rotor size do you want to run?
You need IS to post 160 (for exmaple) adaptors for each end (rotor/mount sizes differ front to rear too so don’t get two the same.

Planned on 180 (183?) front/160 rear

Do you mean “standard” sizes differ front and rear?

Thanks

if

615 brakes which are post mount (I think)! My bike and forks are IS (the older version).

then you need a front mount is to post 180 and a rear mount is to post 160

yes, rear and front mounts are different

Not sure about older versions though, didnt know there were older versions, sorry!

It was my rubbish way of describing as I get post and is horribly mixed up!!

Cheers