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Old 07-09-2020, 07:56 AM #31
Eitek1 Eitek1 is offline
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Originally Posted by Hungster44 View Post
With these instructions it will give us everything we need for 1 bar correct? It is not a set? So if we wanted say 4 bars we would need to increase the quantity? Also what is the load strength on these bars? I would look to add a 180lb RTT plus people in it of course. Thanks!
Electroboy is correct. You will need to order 4 individual bars when you make an order to Tnutz.

As far as the loading, in a static condition the bars and brackets will hold in excess of 1000 pounds. I'm a pretty large guy and I mounted up the brackets on a bar put it on the ground and lightly shifted my weight on it. The bar will flex a bit but no issues. I weight about 280.

The bolts have a yield strength of 65k PSI. At this point the weakest part will be the rails. As Electroboy stated the listed rating is around 150 pounds with the factory rails. Once installed the rack setup is remarkably solid. I think that actually knowing the weight it would hold would require destructive testing and I'm not ready to offer my wife's 4Runner up to the gods of knowledge just yet.

If I had to take a guess, I'd say it would hold a rooftop tent and occupants. The failure mode would have to be a deformation of the rail itself. Between the rail and the mounting point I think it's the weaker link but I think it will carry a significant amount of weight before that happens.
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Old 07-09-2020, 03:19 PM #32
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Order?

I am ordering today, but want to make sure I get this right. I order 4 crossbars, to the specs given in the previous post, easy enough. Then I order a set of 4 brackets? Or 2 sets of 4 brackets?
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Old 07-09-2020, 04:34 PM #33
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Originally Posted by Jpilot View Post
I am ordering today, but want to make sure I get this right. I order 4 crossbars, to the specs given in the previous post, easy enough. Then I order a set of 4 brackets? Or 2 sets of 4 brackets?
One set of 4 brackets. That’s all the brackets you’ll need for 4 bars.
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Old 07-10-2020, 01:35 AM #34
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Ordered

Just ordered. I look forward to getting this put on, looks awesome so far...
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Old 07-11-2020, 09:52 PM #35
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Now my curiosity is getting the better of me. I want to do some destructive testing just to see what it will take to fail my rack system.

Anyone know where I can get a 5th gen pull off rack? I figure I could build a jig pretty easy and I have access to a tote tank. I could just fill it with water until it failed.

It would be an awesome experiment.
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Old 07-12-2020, 01:16 PM #36
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Interesting. In theory I could source a set of the “standard” factory roof rails, buy these brackets and extrusions and end up way cheaper than buying a $1000 aftermarket rack to replace my pro rack.

The issue I have with the pro rack is that it’s limiting me from lifting the vehicle, even by using larger tires, due to its excessive height off the roof that already hits the parking garage at work.
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Old 07-12-2020, 01:22 PM #37
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Quote:
Originally Posted by Eitek1 View Post
Now my curiosity is getting the better of me. I want to do some destructive testing just to see what it will take to fail my rack system.

Anyone know where I can get a 5th gen pull off rack? I figure I could build a jig pretty easy and I have access to a tote tank. I could just fill it with water until it failed.

It would be an awesome experiment.
I see there are some for sale on eBay.

2010-2019 Toyota 4Runner 5th Gen Roof Rack Rail Cross bars Black End Caps OEM | eBay


2010 - 2019 OEM TOYOTA 4RUNNER ROOF RACK CROSS BAR 4 PIECE KIT PT278-89170 | eBay


Stock Toyota 2010-2019 4Runner Roof Rails With End Caps And Mounting Hardware | eBay

Also a forum member:

5th Gen OEM Roof Rack - $125 + shipping -- SW CO

It would be great if someone would donate a rack for the cause of science.
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Old 07-12-2020, 06:09 PM #38
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Quote:
Originally Posted by Eitek1 View Post
Honestly my first response was "yeah, I'm not messing with that". I do like a challenge though so give me a few days to think on it.

On second thought, what is the diameter of the bar? I think I might have an idea....
I just checked mine. The pro rack round bars are 1 3/4” OD.
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Old 07-13-2020, 03:55 AM #39
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NiseRack vs. Toyota's CrossBar

I'm thinking to buy a roof tent, Roofnest Sparrow that has a spect of 134lbs, for my 2016 T4R SR5, 5th Gen.

I think somewhere I read the 2 Toyota Cross Bars would give you the support for 130lbs.

Would these NiserRack give you more support/more weight they can handle with the 4 bars?

Trying to see if there's any +/advantage of going with these NiserRack, instead of the Toyota's.

Welcome your thought on this, & thanks in advance.
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Old 07-13-2020, 04:46 AM #40
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Quote:
Originally Posted by redcometchar7 View Post
I'm thinking to buy a roof tent, Roofnest Sparrow that has a spect of 134lbs, for my 2016 T4R SR5, 5th Gen.

I think somewhere I read the 2 Toyota Cross Bars would give you the support for 130lbs.

Would these NiserRack give you more support/more weight they can handle with the 4 bars?

Trying to see if there's any +/advantage of going with these NiserRack, instead of the Toyota's.

Welcome your thought on this, & thanks in advance.

I don’t believe anyone uses the Toyota crossbars to mount a rooftop tent. They’re bowed and they flex. Their load rating isn’t great enough. But a lot of folks use aftermarket crossbars like Thule, LFD, or Yakima on the OEM side rails.
You can search for threads on the subject. Here’s one:

Final word on RTT on stock roof rails.

Load distribution over the four crossbars in a NiseRack configuration would be a better setup.
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Last edited by ElectroBoy; 07-13-2020 at 04:52 AM.
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Old 07-14-2020, 10:35 AM #41
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I got an extra set of roof rails / caps if anyone needs them.
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Old 07-14-2020, 05:33 PM #42
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I got an extra set of roof rails / caps if anyone needs them.
Let's do some destructive testing WOOOHOOO!

I'll send you an IM and we can arrange how to get them shipped here.
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Old 07-14-2020, 07:01 PM #43
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I've only had LFD Off Rack cross bars on stock rails And then switched to an entire LFD roof rack, so I can't really compare. But due to the design of these aluminum cross bars, do they retain water? If so, would there be any unforeseen issues? Perhaps I'm overthinking it.
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Old 07-14-2020, 07:56 PM #44
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Quote:
Originally Posted by uh0h50 View Post
I've only had LFD Off Rack cross bars on stock rails And then switched to an entire LFD roof rack, so I can't really compare. But due to the design of these aluminum cross bars, do they retain water? If so, would there be any unforeseen issues? Perhaps I'm overthinking it.
I had a Prinsu rack and K9 rack for a while. Both uses aluminum T-slot. They retain a little bit of water afterwards but it dries up pretty quickly on a warm sunny day. I wouldn't worry about it. Plus you're still using OEM side rails so there won't be any water intrusion.
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Old 07-14-2020, 08:45 PM #45
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I've only had LFD Off Rack cross bars on stock rails And then switched to an entire LFD roof rack, so I can't really compare. But due to the design of these aluminum cross bars, do they retain water? If so, would there be any unforeseen issues? Perhaps I'm overthinking it.
What SN_85 said is correct. They may retain a little water but it shouldn't cause any issues. If the water was to seep out at the end of the bar it would just run down the face of the bracket and drop harmlessly on your roof. It wouldn't even have access to the inner part of your roof rail (which is open to the weather anyway).

If corrosion was an issue I understand. The only part that could possibly rust is zinc phosphate coated and is made for this type of application. Everything else won't rust or corrode due to the properties of the material.

What was your concern specifically? Maybe I can answer that better.
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