So far, I've tried 3 different hitch mounted racks. Here's s summary:
1) Thule T2 916XTR - Easiest rack I own to use in terms of mounting bikes. One wheel strap and one ratcheting wheel arm. The problem with this rack is that it is too heavy. The rack itself is nearly 60lbs and lugging it from the garage to the car and back before/after each ride is really a pain. I had this on my Curt hitch and I actually bent something on the car (60lbs + 22 lbs bike #1 + 24 lbs bike #2 = 106 lbs, which is over the 100lbs limit of the sticker on the Curt hitch). Good thing I was able to bend it back. I suspect it was the plates that the hitch is secured to that got bent.
Untitled by
tk_1971, on Flickr
Something got bent:
Untitled by
tk_1971, on Flickr
I was able to bend it back by pulling up on the rack:
Untitled by
tk_1971, on Flickr
2) Highland SportWing with riser Shank accessory (shank # 1370800) - This is the lightest rack that I own (around 20lbs and also the least expensive rack). It also breaks down into 3 really easy to store pieces. In fact, this rack is always in my cargo / trunk. For the Curt hitch, this would be my recommended bike rack. It's not a wheel tray design, but rather the steel "V" has cushioned hooks that the wheels rest on. I replaced the cheap rubber straps with ball bungee cords and I use more ball bungee cords to tie the bikes to the rack so they don't sway around. One more mod to make it more user friendly, I needed more foam to protect my bike frame because the ones that came with the rack is too short for me. I got a piece of 1.5" internal diameter trampoline pole foam and cut it to my liking. It takes more effort to load up this rack than the T2, especially to tie the bike frames down to the rack because I have to work around the wheels of the bikes to get in that area. But the ultimate plus of this rack is that I can store it in my trunk when I'm not using it.
Untitled by
tk_1971, on Flickr
Untitled by
tk_1971, on Flickr
Here's the shank: https://www.etrailer.com/Accessories-and-Parts/Highland/1370800.html
Untitled by
tk_1971, on Flickr
3) Saris Thelma 3 - This rack is also light (around 33 lbs) and has trays to hold the bike wheels, but it uses two plastic straps to hold each bike in the trays. No easy-to-use wheel arm like the T2. The Thelma 3 holds 3 bikes, which is unique for Class I hitch racks (none that I've seen can carry more than 2). There is a Thelma 2 which is lighter and less costly than the 3. With the Curt hitch, this rack cannot be folded upwards when not in use. The trays will hit the bumper before it can be locked in the up position. I've since replaced my Curt hitch with the Draw-tite hitch and I've confirmed that the Saris can fold up using the Draw-tite hitch. I still need to lug this rack to/from the garage before/after each ride but at 33 lbs, it's much more manageable.
Untitled by
tk_1971, on Flickr
Untitled by
tk_1971, on Flickr
None of these 3 rack have ground clearance issues, as my Curt hitch was modified by a welder to give it at least 9" of ground clearance. The extra $20 for the Highland Sportwing riser shank also helped.
I will give the Thule T2 another try now that I've replaced the Curt hitch with the Draw-tite. The Draw-tite has 2 supports bolting to the frame under the car and helps prevent (IMO) the tilting action experienced when the bike racks bounce around from bending anything. Although I am happy with both the Saris and the much cheaper Highland Sportwing, I'm leaning toward the Sportwing simply because I can store it in my cargo/trunk.
Still not done: I have since ordered a Saris Freedom Superclamp 2 which uses two wheel ratcheting arms to hold the bikes (eliminating straps altogether). The only thing going against it will be the fact that I still have to lug it in and out of the garage whenever I use it. I'll post a review once I receive it.