I have a Honda Accord with a hitch rack. (My next car will keep the bikes inside.)

Previously, we had a cheaper hitch rack that the secured the bikes while hanging off their top tubes. This was great, but didn't fold down and took up a lot of room in the garage.

We have started traveling farther for organized rides and my husband just upgraded to a carbon frame. Last summer we bought a Thule 916XTR (http://www.thule.com/en/US/Products/...20T2.aspx)with the bonus of folding up while in the garage.