I have a 4-year-old BMW 320 diesel Touring automatic, which is fine in all respects and has behaved immaculately since purchased new. It is fitted with Primacy runflat tyres. My problem is that the ride is, as I believe with all BMW's, rather stiff, and although I am happy with this situation my wife is growing increasingly critical (aggravated by the post-winter pothole situation) of the ride hardness and is putting me under pressure to change to a vehicle with a softer suspension. I read that Bridgestone is bringing out a new runflat tyre that will give a slightly softer ride but I cannot see that merely changing the tyres will solve the problem.