Dimensions of Roadmaster Dual Hitch Receiver Adapter

Updated 02/04/2026 | Published 06/12/2025

Question:

What are the dimensions for this hitch adapter?

asked by: Keith M

Expert Reply:

Hey Keith! Can you tell me a little more about what dimensions you're looking for? I can tell you the # RM83SR has a rise/drop of 4" but we don't have any other specific measurements on the adapter at this time. I would be happy to get them for you but, it would be helpful to know what you're specifically looking for. If you can tell me in the comments below I would be happy to go out and measure it.

expert reply by: Robin H

Roadmaster Dual Hitch Receiver Adapter
(click to enlarge)

Robin H.

9/8/2025

Hey Keith, did you have a chance to let me know the specific dimensions you need for the hitch adapter? I'm eager to help you find the right measurements and ensure it fits your needs.

Darrell

1/31/2026

@RobinH What is the difference between the RM83SR and the RM077-2?

Robin H.

1/31/2026

@Darrell the # RM83SR has a receiver in-line with the shank and then the 2nd receiver has the 4" rise/drop. On the # RM-077-2 the upper receiver is in the 2-1/4" rise position and the lower is a 2-1/4" drop no matter how you orient the adapter.

Darrell D.

1/31/2026

@Robin Different topic Will the tow defender # RM-4750 work with a Curt base plate and Curt flat tow bars? Can the 4750 be bolted into this sort of setup? Has anyone asked this question before? Thanks Darrell