The outside row(s) of spikes on the front and to a lesser degree on the rear do pretty much nothing for the balance of your car but considerably reduce grip roll. Look and see how much the edge spikes have worn and unless they've been run a long time (or a soft insert) they will look like virtually new.
On a 'grippy' track I usually have the outer two rows off the front (extra row to remove some front steering), inner row off the front and outer row off the back.
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Nortech is ACE!
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