I've taken a few bends and roundabouts at higher speeds with my Astra and it seems to have a tendency to oversteering. Slight understeering appears only at very very tight bends but that doesn't worry me much. Oversteering though can be sometimes very strong. I almost hit a kerb with my rear wheels (got a hot wave through all my body for a second lol). Normally I don't drive like that. It was just testing on empty roads my car responses in more drastic situations to feel it more. Is it normal behavior for Astra G or maybe my tyres are just complete crap (Sonar 205/40/17)???