Robbert,
110psi sounds like too much to me for the rear axle. You probably have 295/75R22.5 load range "H". 110 in the 295 will carry 24,020 lbs. Here is a link to air pressure for a stated load capacity.
http://www.trucktires.com/us_eng/technical/index.asp
Use the second link down if you have 11R22.5 and the third link if you have metric 295 ect.
I run 95 front(axle weight 10,300) and 85 in the rear( axle weight 16,500), but I know the exact weight of each wheel position also. Check out the weighing the coach thread for a link I've posted to Michelin. It has two good videos to watch.
http://irv2.infopop.cc/eve/forums/a/tpc/f/9686094452/m/4091018261
Remember now that the weather has cooled air pressure has dropped in our tires and so has the load capacity. If you aren't checking air pressure everyday
, check them now.