Right, I'm wondering if mine (172 rears) need doing. It was just MOT'd and it passed, so they can't be leaking, but the back end doesn't feel planted at all. I've changed the tyres from Nankang ditchfinders to Toyo Proxes T1R's, but it still feels skittery. I've done the bounce test, and they settle after one bounce, with just the tinyest little bob at the top... Is this just how the 172 handles? Just want to get it right... 
