My stigcher landyacht (above picture) has 7 degrees inward angle on the rearwheels. I can lift one side up by 200 mm before the leeward wheel becomes perfectly vertical. I think this to be quite small and I figure you can easily go up to 10 degrees.

My other landyacht, class 5, has more angle to the rearwheel. See picture below. This is about 11 degrees.





I hope this helps.

Wouter