iv fitted this rear spoiler to my zed but i still get lift at high speed

 

 

any thoughts as to what size to go up to now??

Any fool can see that the problem lies with the angle of attack..add 2.3 degrees more angle and it should be fine.

no - you need another couple on the sides and that'll do it.

Place this in the boot as it is heavy it must = more downforce

 

 

failing that, use stus momma

I see the problem ,its not an adjustable one for track days etc:eek: god help us ,surely theres not worse out there:rolleyes:

try one of these they may help?:D