I have a Kettler Marathon treadmill and cannot for the life of me get the belt to run straight.
It is forever moving to the right, meaning I am always having to re-adjust, which means I cant concentrate on running as I'm always worried the belt is going to get damaged.
At times I can get the front of the belt dead centre, but then the rear is to the left!
I've also adjusted it so many times I dont know if I've overtightened it now!
Anyone have any experience of this and any "idiots guides" on how to put it right?