Same here with my XT785s. Flip bike over for a minute and it needs the 2 pump rollover afterwards. Cant think of a scientific reason for issues with rear only though.Question for Shimano guys,
I have found the "air issue" to only happen with the rear brake. Front has been solid and dead consistent.
Is this true for the rest of you?
Related topic... Riding grabby XTs with baby-knob XC race tires is a scary-skid-happy experience. And my knee has a hole in it to prove that.