Strange tyre seating on wheel

[rosey_ej9]

At the weekend I decided to add some neg. camber to my car for my trackday this coming Friday. I settled for just over 2 degrees on the front and thought all was good after jacking it down.

However after going for a drive the front wheels had adopted a position on the tyre that I haven't seen before; usually the front wheels sit neutral on the tyre with a small bulge on the bottom of the sidewall, because the tyres are wider than the wheel. After driving, the wheels were sat as pictured much further over on the sidewall of the tyre on the bottom edge. I'm concerned at the way its sat as I want to know that I can push the car safely on circuit; just wanted other peoples opinions to put my mind at ease

(EDIT) I will mention that I have jacked the car up and back down which takes the tension out of the tyre and 'relaxes' the tyre back out to normal again, before driving it restores it to the pictured position. Tyres are Yokohama AD08

I've attached pictures of the rear wheels too which demonstrate how the fronts used to sit with more neutral settings. Excuse the state of the front wheels, been through two trackdays on them

REAR

FRONT

Lewis

 

[b16 mini]

Looks like you have set positive camber from some of the pictures

 

[rosey_ej9]

Its negative camber, deceptive because of the way the tyre is.

I think the tyre deflection at the bottom can be explained by the fact that camber will cause the inside edge to contact the ground first when the car is put to rest from the air, which will then cause the rest of the tyre to be pulled across to the inside of the car while the suspension geometry is still bringing the wheel down at the cambered angle. I just judged what was pictured to be quite extreme for what is a 1 degree or so increase of camber

 

[rosey_ej9]

No-one has advice on this?