UPDATE: We tried the Fultyme but just could not get it to work for our ST's where we felt comfortable driving over 1000 miles one way. We tried it with the pool noodles but the derailleur hit the back tire guard. We also didn't like the way the arm held the tire on, one worked and the other wouldn't even go near so no use. We ended up returning it after fussing for a few hours to get it to work. Now YMMV, we are a bit handy but definitely not as much as some of you are. I know the Fultyme worked for many and it was a nice bike rack for a larger bike.
We ended up buying the Rambo bike rack from Scheels, it was 349 plus 10 shipping minus 75 if you opened a credit card so a total of 284, a bit over twice as much Fultyme. But what a difference! Definitely worth the price. This bike rack is so well built, the bikes are so secure on this rack. We put it together, put the bikes on and no need for pool noodles, tons of bungees or velcro's. It tilts down easily and sturdily so we can open our rear hatch. The arm is adjustable to hold the front tire as is the rear tire holder. And the whole things folds up and out of the way. It's also rated for 145 lbs. We also bought a Pro Bike Tool traveling cover on Amazon and we feel so much better knowing our bikes are safe and secure.
I'll post a few pics and the link
https://www.scheels.com/p/rambo-fat-tire-bike-hitch-rack/81615301447.html#q=rambo+bike+rack&lang=en_US&start=1
This is just what we ended up doing. A little bit of tweaking with the cover and now we need to test going down the road 65 or more mph. Then we'll really know.