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Outside Measurement of Roadmaster Anti-Rattle Hitch Extender  

Updated 11/17/2025 | Published 12/07/2024

Question:

I will using this adapter with a set of Rock Tamers by mounting the Rock Tamers to the larger portion of the adapter. What is the outside tubing size of the larger section of the adapter, 2-1/2” or 3”? Thanks.

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Expert Reply:

Hi Dan; the outside tubing on the Roadmaster Anti-Rattle Hitch Extender # RM-071-1075 is 2-1/2" x 2-1/2" so you would need the Rock Tamers Heavy-Duty, Adjustable Mud Flap System for 2-1/2" Hitches # ERT00110.

expert reply by:
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Robin H
RM-071-1075
RM-071-1075
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Robin H.

11/17/2025

Hey Dan, how did the setup go with the Rock Tamers on the Roadmaster hitch extender? Your update could make it easier for the next person trying to match those sizes.

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