[Liles]

I've used Yakima's Dr. Tray for my vehicles and it's been great. It's really adjustable and easy to use for me.

Dr.Tray 1.25”

Dr.Tray is the ultimate tray rack for your hitch. It can easily handle road, mountain, and fat-tire bikes with up to 4.8” tires. Bike clearance is top notch, with 18” between the trays. To make it even better, the bike tray spacing can be adjusted tool-free while the bikes are loaded, virtually...

yakima.com

 

[lmike6453]

The best is a platform style that only touches the tires when mounting a bike.
Check out 1up (most popular for this type) or Rocky Mountain Guiderail that came out a few months ago.

Bike Racks

1UP USA builds the most durable, hassle-free hitch-mounting and bike-loading racks you’ll find—anywhere. Our unique “no hitch pin” design increases depth adjustability and reliably eliminates wobble and play to keep your bike(s) incredibly secure. Plus they attach and unattach to your vehicle in as

www.1up-usa.com

I personally own a Kuat Transfer 2 to save money and it does work great for a mid grade platform rack, but I should have bought 1Up since I bike often.

 

[LegalBrief]

Bike Racks are a challenge.. the truck is up high. Our Mtn Bikes are heavy, so we got a device to lower the rack 6" from the receiver, making the loading and unloading much easier.

 

[lmike6453]

Bike Racks are a challenge.. the truck is up high. Our Mtn Bikes are heavy, so we got a device to lower the rack 6" from the receiver, making the loading and unloading much easier.

Lowering the ground clearance of the rack runs the risk of it scraping the ground on steep uphills or large speed bumps.
Some bike rack manufactuers make a ramp add on for not having to lift up heavy bikes: