I had the roof rail issue on my 18 sport, they kept coming apart and were replaced twice under warranty, so when I upgraded to a 21 ST I purposely found one without roof rails. Give some serious thought about the rails and will you really use them. I've had rails on every suv we've had in the last 20 years and never used any of them. If you want them for looks then so be it, but I think the ST looks better without them.