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Are Rock Tamers 2 and 2-1/2 Inch Hubs Interchangeable  

Updated 03/28/2025 | Published 09/14/2016

Question:

I have a set of rock tamer mud flaps with the 2 1/2inch hub but want to know if I bought the 2inch hub if everything would attach. That way I can have both hubs and interchange the rest of the parts?

0

Expert Reply:

Yes, both the 2 inch hub, # ERT034, and the 2-1/2 inch hub, # ERT057, attach to the same side arms, # ERT039 and # ERT040, and use the same clamp bolts, # ERT052. So the 2 inch hub will work with the same parts currently on your 2-1/2 inch system!

expert reply by:
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Michael H
On A. profile picture

On A.

3/27/2025

I have a 2 1/2 inch hitch ordered a 2 1/2 inch hub. How do I know if it’s going to securely fasten my rock tamers to the hitch? I also ordered a 2 1/2 inch hub because I thought I had a 3 inch hub as the bolts were not long enough to reach my 2 1/2 inch hitch. Please help I gotta get back on the road.

Kate F. profile picture
Etrailer Expert

Kate F.

3/27/2025

@OnA Hello On A, Yes, if you have a 2-1/2" hitch and you’ve ordered the 2-1/2" # ERT057 Rock Tamers hub, that should be the correct match. The hub clamps securely around the shank of the ball mount that slides into your 2-1/2" receiver. If the previous bolts were too short, it could be because the hub was oversized (possibly for a 3" hitch), and now the new 2-1/2" version should fit snugly and allow proper bolt engagement. Where are you headed once you get back on the road?
On A. profile picture

On A.

3/27/2025

@KateF thank you so much! Headed out to Wolcottville, Indiana, and then to Portland, Oregon and then who knows from there ??
Kate F. profile picture
Etrailer Expert

Kate F.

3/27/2025

@OnA My pleasure On A..... Sounds like you are "On A" pretty awesome adventure! -Safe Travels
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