Don't they have independent rear suspension? If they do and the wheel pivots on a swing arm a arm setup the camber changes with weight. Ever been behind a Mercedes or BMW the rear tires always tilt in at the top. This helps them corner with the negative camber. You will see a lot of import cars that are lowered and do this too. Could your mower be doing this? You may not see it with your eye but there is actually a gauge you can put on the hub or spindle square and it will give you a reading for the camber.

 

They should not be doing this because its a double A-arm setup. The tire should stay at the same angle no matter where in the suspension travel it is which is perpendicular to the ground.

However if the bushings in the A-arms are worn out then it will ride at an angle. Park it on something flat and level and walk behind it and take a look. Or get the rear tire off the ground, grab hold of it and try moving it by hand.

Although Wright standers wear the tires like this all the time. I dont go through nearly as many tires for ZTR's as I do for the Standers.

 

I forgot to mention the bushings. Most of the time with cars they're offset bushing meaning the can be adjusted for the camber. However, the way pugs describes the suspension it sounds to be always neutral which would make sense to keep a flat level cut.

 

Thanks guys
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