So what do I need to make this work? It’s a formula Rx brake (break?) and a yeti asr5.

image by Subsea100, on Flickr

A brake adaptor/mount to suit your disk size:

http://www.chainreactioncycles.com/mobile/brake-spares/brake-adaptors

^^^ post mount to IS adaptor.

Is this a clever title from the OP? I was expecting threads about chamois cream…..

If it’s 160mm, I may have a new unused shimano adaptor which I too bought for my asr5 yet didn’t need. I can check and sell it too you if you like?

Thanks for the replies

Kryton, alas it’s 180mm

Mildred & tonyd, now I know what it is I shall check the local bike shop (which will only have it in the wrong size) then order from crc

Lucien, if I ever complete this build I may be in need.