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Old 07-03-2013, 12:06 PM   #1
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Bumper mounted bike rack

This is a heated discussion between DW & I. We have a Wildcat 312BH-OK. Since it's an Extralite, she says we can not mount our bike rack on the bumper because of discussions she has read here on the FR forums. She said that it causes the bumper to flex when driving which is why we kept loosing sewer end caps from the bumper of our last light weight 5er. I have hauled the bikes in the past & it seems sturdy enough.
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Old 07-03-2013, 12:09 PM   #2
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Listen to the wife. Full stop!


Post the pics Herk!
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Old 07-03-2013, 12:13 PM   #3
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Yup. Wife's right - ultralight or not, bumpers weren't designed for carrying much of anything.

I have friends who had their bikes drag down the road days after being all proud of his new bike rack attachment for it.

Heck, I wasn't even game for the bike carrier offered as an option from Sabre because I'd read about the beatings that bikes take on the back of campers.
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Old 07-03-2013, 12:16 PM   #4
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Listen to your wife! Better to listen to her now than after you deposit your bikes/bumper on the road somewhere and possibly cause a serious accident.
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Old 07-03-2013, 12:24 PM   #5
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Unless you have a factory bumper mounted rack that is already designed for the load, I wouldn't do it.
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Old 07-03-2013, 12:39 PM   #6
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Now what about the spare tire? Two adult bike have to be lighter then that... right?
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Old 07-03-2013, 12:56 PM   #7
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Quote:
Originally Posted by nwslmn View Post
Now what about the spare tire? Two adult bike have to be lighter then that... right?
Not necessarily. Adult bikes can be HEAVY unless you pay for a lighter bike.

That said - when I had my pop-up, I carried 3 bikes using a Thule Raceway on the back of our Durango. To carry more, I would have gotten Thule products to carry them on top of the SUV. Just prepare yourself for sticker shock - $$$.
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Old 07-03-2013, 01:11 PM   #8
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I had a receiver welded to the frame and bumper by the RV dealer, certified welder had to do it. Roo 19. Haven't had any problems.
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Old 07-03-2013, 01:14 PM   #9
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The main difference is not just weight, it is the twisting force, or torque. the bikes ride much farther out away from the bumper than the tire, thus greatly increasing the torque. Try this, push down hard on your bike rack just above where it us mounted. Then push down just as hard at the farthest end of the rack. I'd bet you can see your bumper twist. Now imagine this twisting happening a hundred times a minute as you cruise down the road --- get the picture? And yes, this does happen, always.
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Old 07-03-2013, 01:35 PM   #10
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I had a receiver welded to the frame and bumper by the RV dealer, certified welder had to do it. Roo 19. Haven't had any problems.
Yet!
Was the welder also a structural engineer?
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