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Roadmaster Baseplate Compatibility with Roadmaster Guardian  

Updated 09/22/2026 | Published 09/18/2026

Question:

Is this baseplate compatible with Roadmaster Guardian Rock Guard brackets?

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Expert Reply:

Thanks for letting us help, Otto. For Roadmaster Direct-Connect style base plates like # RM97NQ, the correct Roadmaster Guardian is the Roadmaster Guardian XL Rock Shield # RM82DQ. The original Roadmaster Guardian Rock Guard # RM-4000 is designed for crossbar-style base plates and will not work with a Direct-Connect setup.

Do you already have a Guardian and only need the second vehicle mounting brackets? We currently carry the Roadmaster Guardian Rock Guard for Towed Vehicles - 2nd Vehicle Kit # RM-4000-1, but this kit is specifically for the original Guardian # RM-4000 and is not designed for Direct Connect base plates.

We do not currently carry the second-vehicle kit for the Guardian XL # RM82DQ, but I'd be happy to look into getting it added to our site if that's the part you need.

expert reply by:
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Christopher H
Otto profile picture

Otto

9/22/2026

Thank you sir. Sold my towed cross bar mounted base plate years ago and trying to repurpose 4000 rock shield. Don’t want to install a crossbar on my 2026 when direct connect system is so user friendly. Will take a look at XL mounting system and see if similar mounts can be fabricated for my needs. Thank you.

Christopher H. profile picture
Etrailer Expert

Christopher H.

9/22/2026

@Otto Definitely agree with your sentiment on the direct connect vs. crossbar style base plates. Stick with direct connect since you have the option. The part number for the second vehicle brackets on the Guardian XL is 4100-1 if you wanted to take a look at them on Roadmaster's site.

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