With the rack on! I put the rack on yesterday for the heck of it which means the XK had to sit outside. This morning when my wife came home from the gym, she pulled right in the garage forgetting that the rack was on. My first reaction was, great, RR lift has failed - but a quick look around the vehicle and all looks in tact. It barely made it in slightly rubbing the frame of the garage - so I'm guessing that it is due to the following - vehicle out overnight in CO, so tire pressure slightly down, and the tires are almost a year old now, so some tread has been lost...anything else "mechanical" I should consider or look at?