We used to have a mini with rft's. hit a pot hole on two occasions that I had not seen. Felt like I had gone thought the world and landed on the other side. Tyre was fine as was the wheel. However front suspension top mount sheared on both occasions. My 330i with 17" rims has been cracked down the centre Nd had not seen a pot hole. Rft's are not only expensive but damage other parts of the car. Change them over everything improves.
E90 330i SE Auto Graphite Grey Metalic