£60 rrp on the post mount and they sell for around £53 at best. Oh well!
They are working a dream so I just won't change anything. Other than the pads... Haven't had any squealing. Lol'd as my mate on his di2 spesh roubaix disc thing squealed for 100km the other week.
Yep £90 is cray but I guess thats the RRP.