The steering on an i3 is always a bit light but I'm now finding that the the car does not feel very stable at speed (60mph plus). I've had the tracking checked and this was adjusted. This helped avoid the need for continual steering corrections but it has done little to improve the high speed stability. The front tyres are worn but have about 3mm of tread left. I'm reluctant to get new front tyres yet as new ones only have about 6mm tread and I'd like to get a bit more life out of them. I have new rear tyres (as these were getting low) but this hasn't made any difference to the stability. Do others find stability is poor at speed (I don't think it was as bad when I bought the car a year ago) or have any ideas as to the cause?