I got the 1-1/4" version which comes with a 2" adapter. If you know you'll never carry more than 2 bikes then that's all you need. I carried 2 bikes on it up to Canada and down to Florida with no issues at all. I'm not saying it won't be safe carrying more than 2 (3 bikes is a max per 1UP's recommendation for 1-1/4"), I'm just saying I haven't had any issues with carrying 2 bikes, 1 being an ebike. My car has a 1-1/4" receiver and my RAV4 has a 2" receiver.
I totally understand this and I was made aware of this possibility very early on of my 1UP ownership. I was riding and at the end of my ride I got a flat by the time I got to the car. Without a filled tire the bike will be loose on the rack. Luckly there was a bike shop nearby so I drove over there to get a tube for my fat bike. Immediately after that I started thinking about solutions for this if it ever happened again. If you use the 1UP USA wheel lock that goes through the wheel between spokes then the wheel will never separate from the arm of the rack far enough to come out. It will be loose but won't come out so you won't lose the bike. If you know you're putting the bike on the rack with a flat you can cinch up the arm further along so it clears more the wheel. If the bike goes flat while you're driving the lock I mentioned will keep it from falling out. By keep a couple of rags in the vehicle as I do you can drape over the top of each wheel with a rag where it meets the arm and that will reduce if not eliminate the movement. The arm against the wheel with the rag in between will keep it in place and won't blow away. Of course now with all this prep I haven't had to transport a bike with a flat since. Now that I said that, I'll get a flat today. LOL.
One other big reason to get the 2" is it has a lock through the hitch/rack. The 1-1/4" does not have this and to me is a poor design. It relies purely on the tension and that security bolt on the front that tightens it in. Well that and a piece of velcro if that fails.
www.toyotanation.com
I use a 1Up with my 5” fat bike tires and I always use safety straps.
This is the same setup I have. There were no 2" receiver hitches available for my car (a new generation model of my car at the time), so I was forced to install a 1-1/4". I typically only need the single tray when using my car anyway. I use the 2" adapter when attaching to my wife's Forester when we travel together and use the 2nd tray.
For this reason, on longer drives I'll wrap Voile straps to cinch the tires to the top tire spools to minimize the amount of bike flop should the tires lose air.
Tractor Supply near my work has several lengths of these in stock to chose from.These also come to mind, I have a few and they are pretty handy. 32 seems a bit long, they come in different lengths
Nite Ize 32 in. Gear Tie in Bright Orange (2-Pack) GT32-31-2R3 - The Home Depot
The perfect size for bigger organizational jobs in your home, garage, yard and tool shed, the Nite Ize 32 in. Gear Tie bundles garden tools, hoses and industrial appliance cords in a cinch and a twist.www.homedepot.com
