how the heck did I miss this thread
I recommend the hitch and metal hitch mounted bike rack.
THe ones that mount to the vehicle via- straps..
well with airflow etc-- you have to constantly be going out back and checking those straps... (been there done that on my 4 door saturn)
You cant really lock the bikes to the car-- because all they have to do is cut the straps and they can a bike(s) in seconds.
Many times-- the top part of cars tailgates (SUVs/CUVs)- that part is plastic-- I think the Nox is plastic way up top-- im sure it would crack.
The hitch racks- many have locking cables incorporated into the rack.. so they cant steal the bikes-- or the rack-- because-- youve locked them to the metal bike rack- and the hitch has a locking hitch pin (bought separately)--- so they cant steal the bikes or rack
So youre not going to get a casual person walking up and taking a bike,
That being said---
I added a hitch to my Nox-- did it all myself. (I also added wiring etc) but it all came out to about $180.
this tow hitch also allows me to use my cargo rack. so you may want to think about cargo racks too- for future use..
how to add hitch- with pics- and prices on the parts I used.
Also recently took a 717 mile/1,154 KM trip with the bikes attached.
It is a swing down bike rack.... so knowing that once the bikes are on- I cant just open the tailgate-- I pack stuff in a way that the stuff well need is closer to the rear seat. (thinking ahead)...
though if I really need to- I can take a few minutes and undo the bikes and open the tailgate.
The load in the rear.
The bikes---- kind of hard to see-- but out of the end of the bike rack- a metal cable comes out- and locks the 1st bike to the rack.
If you cant get the 1st bike off-- you cant remove the 2nd bike.
here is a close up of the bike rack mounted on my Traverse.- remove a pin and it folds down to allow the tailgate to open.