When I bought my 380SE, it had what appeared to be trailer tires on it. Jetzon was the brand. Anyway, they were hard as hell and would spin at the drop of a hat in the dry. Switched to Pirelli P4000 (not the greatest tire) and it will only spin when I push it really hard around a turn. Tire pressure could also be a factor. I believe my car calls for 29 rear and 31 front. I am probably wrong, but it is lower than what I am used to running tires at.