My wife and I purchased a 2011 Windjammer 3008W last year and have AL-KO axles installed on it. It too doesn't have a lot of clearance between the top of the tires and the bottom of the wheel well.
I've not had any issues of rubbing on the wheel well, but getting around to replacing the OEM tires (Trail Express Power Touring) which are now over 3 years old and afraid what little clearance I have now will get even tighter.
Having just done the bearing and brakes, without any load on the axles, they are slight down from parallel with the ground.
Is the problem lately with the windjammer 3008w just with the Dexter axles?
Still loving the 3008W.
TT 2011 Rockwood Windjammer 3008W
TV 2015 RAM 3500 MC 4x4 DRW w/ AC69RC HD Trans
Anderson WD hitch