I went out into our warehouse and inspected the drawbar that comes included with the Hidden Hitch Trailer Hitch Receiver with Drawbar - Custom Fit - Class I - 1-1/4 inch, part # 60832 (no longer available), and it has a solid shank.
The included Class I drawbar, that is designed for 1-1/4 inch, hitch openings has a tongue weight capacity of 200 lb, and gross trailer weight limit of 2000 lbs.
You may also need a Tow Ready Custom Fit Vehicle Wiring for the Dodge Caliber, 2007, part # C55050,... view full answer...
The overall measurement from the top of the roller to the bottom of the U channel is 2-1/2 inches. I have provided a photo for you that shows the dimension you inquired about.
I have linked you to a parts review video for the Roller Bunk # DL21741 you referenced.
I have also linked you to a page that shows other Roller Bunk options as well. view full answer...
Anytime you are going to be installing a hitch to your 2007 Dodge Caliber, you will need to check your owners manual for the vehicles maximum towing capacity. You will want to make sure that your vehicle will be able to handle the capacities of the hitch you will be installing.
The Draw-Tite Trailer Hitch Receive, # 24769, is a Class I hitch and has a maximum towing capacity of 2,000 lbs. and a maximum tongue weight of 200 lbs.
The factory Class I hitch would have to be removed to install... view full answer...