I've just been to the garage to check all 4 tyre pressures on my mum's Astra. Something's wrong somewhere, it's like you're driving on ICE, but weather condtions are fairly okay at the moment. There's an every-so-slight feeling that the power-steering is occasionally pulling a little to the left, like a nudge. Any ideas? Oh, and the front tyres are at 31 yet look as if they are deflated a lot.