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Dimensions of Roadmaster Dual Hitch Receiver Adapter  

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

Question:

What are the dimensions for this hitch adapter?

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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:
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Robin H
Roadmaster Dual Hitch Receiver Adapter
Roadmaster Dual Hitch Receiver Adapter
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Robin H. profile picture
Etrailer Expert

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 profile picture

Darrell

1/31/2026

@RobinH What is the difference between the RM83SR and the RM077-2?
Robin H. profile picture
Etrailer Expert

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. profile picture

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
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