Tyre replacement for BMW 320i
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Asked by George Garcia
The original 225/45 R17 run flat tyres on my wife's 2006 BMW 320i will soon need to be replaced. I'm not a particular fan of the run flats as they give a much more bumpier ride than normal conventional tyres and then of course there is the replacement costs which are probably twice as much as the conventional ones. When I asked a BMW service mechanic if it was possible to fit conventional tyres without any problems he said there was a safety issue if a conventional tyre were to blow out at high speed, and that the run flat sensor could be damaged so he advised to stick with the run flats. What are my options?
Answered by CarsGuide
7 Oct 2010There's no reason you can't fit conventional tyres to your BMW, although BMW people and some industry experts would tell you that you would affect the handling of the car. The BMW suspension has been tuned to run the run flats, which have a hard sidewall that contributes to the overall springing of the car, so fitting a conventional tyre with softer sidewalls will affect that springing and the handling will be altered to a degree. But lots of people have changed to conventional tyres without any trouble. As far as the run flat sensor goes, the BMW doesn't have one. It uses the ABS brake system to determine when a wheel is running at a different speed to the others, thus indicating a flat.
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