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Topic Closedrear bike rack weight question
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Medicine Wolf View Drop Down
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Posts: 36 		Direct Link To This Post Topic: rear bike rack weight question
    Posted: 29 Feb 2020 at 4:35pm
Got the Swagman but now cannot put my tailgate all the way down ...Plus the added tongue weight in addition to needing longer chains have me rethinking the whole deal...
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Tars Tarkas View Drop Down
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Posts: 1452 		Direct Link To This Post Posted: 29 Feb 2020 at 6:35pm
Aside from the tailgate issue, will you be able to make a sharp turn with bikes on the hitch?

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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 01 Mar 2020 at 10:33am
Back on the original "physics" question, the highest load on the rpod frame occurs just aft of where the axle attaches. The design safety factor for bump loads at that point is pretty marginal already. Hanging more weight off the rear of the trailer will make that worse. I'd recommend avoiding that if possible. 

 
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Medicine Wolf View Drop Down
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Posts: 36 		Direct Link To This Post Posted: 01 Mar 2020 at 11:35am
I think I am going to go with the "Jack-it" that mounts on the tongue...The rack is only 25lb and the bikes are a combined 50 lb... and the price is right at $159...I don't like the idea of bikes hanging off the back of the trailer...and I need to put my tailgate down to let my dog out as he rides back there ...
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lostagain View Drop Down
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Posts: 2595 		Direct Link To This Post Posted: 01 Mar 2020 at 1:17pm
What happens to the stress analysis when you move the end of the axle further outboard from the frame, such as the actual distance found in the rPod?  How does that change the overall stress points?
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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 01 Mar 2020 at 6:07pm
Originally posted by lostagain

What happens to the stress analysis when you move the end of the axle further outboard from the frame, such as the actual distance found in the rPod?  How does that change the overall stress points?


Not certain I’m follow you but if you’re asking what happens if the frame rails are further inboard but everything else stays the same then the frame stress should be the same (the axle stress would be higher tho).
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
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lostagain View Drop Down
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Posts: 2595 		Direct Link To This Post Posted: 01 Mar 2020 at 6:39pm
What stress colors would show on the frame & axle if the axle was extended further outboard from the rails, as is the case with the r-Pod?  If I recall correctly, the axle, between the frame rail and the torsion arm is in the ball park of about 8", which would appear to be quite a bit further than exists in the your stress illustration.  Would that distance change the how the stress impacted the frame/axle assembly?
Never leave footprints behind.
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2019 Ford F-150 4x4 2.7 EcoBoost
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Posts: 5290 		Direct Link To This Post Posted: 02 Mar 2020 at 5:22am
It shouldn’t change the frame loads but a longer distance between the hubs and the frame attachments certainly will increase the axle loads.
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 02 Mar 2020 at 6:18am
Originally posted by Medicine Wolf

I think I am going to go with the "Jack-it" that mounts on the tongue...The rack is only 25lb and the bikes are a combined 50 lb... and the price is right at $159...I don't like the idea of bikes hanging off the back of the trailer...and I need to put my tailgate down to let my dog out as he rides back there ...


As others have said, check your tongue weight to be sure you are within your tv limits, it will go up by about 75lbs.
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
2015 Rpod 179 - sold
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