Exo k4 vs kifaru ark Which one is more stable?

zhangfeng

FNG
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Feb 6, 2026
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I have no way to try these two frames, so I want to ask if there are any brothers who have used these two frames at the same time. Which one is more stable? I don't want to shake on my back. What's the burden on my shoulder?
 
I found the ark more comfortable. It takes more adjusting to not feel it is pulling backwards compared with the K4 though. I found the Ark slips less on my hips.
 
I would say that has more to do with how you place the load and strap/compress the load then the actual pack. You can make any high end pack “shake”on your back if you load it incorrectly.
 
Your body type and fit will play a large roll in your question. Assuming both fit a person equally the difference between the two (duplex lite) regarding your question is the kifaru is more rigid and provides less flex as you walk compared to the EXO that does a better job moving with you as you walk. So specifically if you want a more traditional “frame” type pack feel then it would be the kifaru- although it is maybe 20-30% difference between the two.

Not a fan of the ARK unless you are a 25” frame guy.
 
I have both. My answer largely depends on the pack you use because I'm assuming from your post that you are just wanting to compare frames and the pack is irrelevant. I think Kifaru makes one of the best frames on the market but I have never experimented with using other bags on that frame other than a couple of Kifaru bags I own. I do attach a customized lone wolf on the Ark when its deer season and I'm packing in a climber. The K4 I use with the K4 pack as I bought them together. Frame wise the Kifaru fits me like a glove. The K4 is comfortable but the fit isn't as snug. I'm 6'1" 184 lbs for reference.

My answer largely depends on the hunt as I'm not a massive fan of Kifaru's more expedition like bags. Because of that, if I'm packing in gear, tent, weapon, and all my food in an expedition type hunt, I'd recommend Exo K4 pack and frame. If I need a customized pack set up where my pack would be used in a variety of ways, I'd recommend the Ark. Exo K4 for me is the Keep it Simple Stupid method when I'm going a long time and need to carry a lot. The Ark usually requires a lot more technical adjustments to make whatever is on the pack comfortable, especially when you are strapping other things to it. You just notice immediately if its not balanced correctly. The k4 in that regard has a lot more user error built in.

Kifaru's frame can stand alone with many pack set ups, but I just haven't experimented enough with a lot of bigger expedition packs with that frame other than one which I was not a fan of.

Hope that helps.
 
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