Looks like a ski run I took last weekend, I mean it FELT like that, it was only single black so it was likely half that. Haha.

I like these threads, it reminds me that I'll never flip my truck cuz I'm such a chicken I won't get to half the angles folks are talking about.

It's already been established there's a difference between the angle of your tires, and the angle of the actual cab as it responds to the incline.

There's an app for your phone now. Smittybuilt Clinometer.
I can't remember what the danger points were, maybe 30 degrees on the FJ.

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You got ALL the cool shite @Saker !!!!

So who wants to do the obvious. .. find some level ground and jack the 4Runner up on one side til it is close to tipping. If it is a stock unit then that would be a good starting point.

I suppose if you wanted to be safe about it, using a vehicle with sliders or something structural, using a crane and safety lines just in case it tips, to avoid damage. It'd be an interested set of experiments for sure.

Naw, just attach a come along or a chain with a turnbuckle to a tree and the frame. Just have to be careful.

I have an inclinometer in my truck and I can tell you that 15 degrees side angle makes you feel like you might roll if you're not careful. It's from inside truck. From outside it looks like slight incline - nothing to worry about. At 20 degrees you don't feel like getting out of the truck or let passenger to get out, because it feels like truck might roll over if you sneeze. Maybe I'm overly sensitive to off-camber but that's how it feels to me : ) I never tried bigger angles but I think realistically stock T4R evenly loaded without heavy load on roof can handle 30-35 degrees on hard surface, but I don't want test it on my truck : )

Oh it was definitely at a downhill angle. I slipped a bunch of times trying to get up/down the hill to spot haha.

We could probably get a good guess from pics like this.

This thread has pretty much answered my question as to how much of an angle our rigs can traverse before tipping. I doubt, as others have said, I will push the mechanical capabilities past my pucker tolerance. I will be trying a hillside trail with a few boulder outcrops soon but from the image angles shown here they probably won't exceed 25°. My other question is how much diagonal force can the connecting structures of the front a arms and rear wheel components handle before failure? Jetboy's pic above visually shows it's pretty high. @1engineer maybe you could speak to that? Also what are the connection points called where the a-arm point and the control arm?! meet the wheel hub? Blocks 1 & 11 of the diagram below. Second pic is of the trail with out crops. Hill side, dry, firm but narrow on slope with trees below. Narrow margin for error. All in all tame compared to what I've read here. Any guesses on the angles? My rig is stock pro with sliders and steel tank skid lowering cog.

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I believe it is called the "spindle" or "steering spindle" which makes it sound quite week lol!

Have fun trying the 4Runner on the pictured trail! I'm sure once you see how solidly the vehicle goes through that you will confidently look for incrementally bigger challenges! That's what it's all about! And of-course each time you want to try something bigger your wallet is going to get lighter as you mod more in preparation!

The real question is how far can you push your 4Runner before the air bags go off.

Thanks those connecting points do look vulnerable but evidently can handle the weight of the vehicle diagonally. As far as bigger challenges, that's what I'm afraid of. The t4r is my daily and I need it to last along time. Just some RCI steel skids up front, an Undercover HWMS and a winch and that's it. Any crazier and I'll be looking for an old 4x4 jeep or pick up with a solid frame to build into a rock crawler. Something that if it breaks or rolls over, I won't be sobbing on the side of the trail. lol

So after more research,

(All you experienced wrench jockeys enjoy a chuckle as us newbs catch up)

The main component in block 1 is a steering knuckle and in block 11 is the lower control arm. No distinction regarding the tip.

Silly me. I wasted my time getting a degree in computer science when I should've been learning stuff that matters. lol