We have 2009 Nimbus.
When braking the dash rear air pressure gauge drops to near 100psi (like stopping at light etc). The front gauge drops only slightly. Once moving again pressure goes back to about 125psi fairly quickly and remains.
It has been going this for a long but now just curious if may be a problem.
Thanks to all and safe travels and Happy New Year.
Craig
Not an expert.
Same thing happens on mine, always has. If it's wrong, we'll both be seeing a mechanic.