I would agree with most of this, being on stock suspension myself. Stock suspension with 275/70's and sliders has gotten me a LOT of places over the last year and a half, however I will be upgrading to a 2-2.5" lift and 255/80's (32.8x10.5) here soon to increase my skid plate ground clearance, to increase wheel up travel so I am not on the bump stops hard every time I come across a water bar on a trail, and to increase comfort on the trail. My CV's are currently angled up to the wheel, so post-lift I am looking to end up with the CV's at the same angle, but angling down towards the wheel versus up to it.

The piece of mind coming with increased clearance at the front skid is worth the lift alone. I have been on many easy roads that have been made more nerve racking because it has a higher center with occasional rocks that like to ping along the skids. Having an extra 2 inches under there would be a world of difference in my comfort knowing that I won't smash into a rock (which I have done). But yes, I think that most people don't give the stock rigs nearly enough credit for what they are capable of.

Thanks for all the info guys. I should have noted that I'll also be adding an ADS suspension:

ADS 2.5 Remote Resi Shocks
2.5 Piggyback Rear Shocks
Uniball Upper Arm

Will this effect clearance in any way?

I did new wheels and 275s with 1.75"/.75" lift and was rubbing in the back, then I got it realigned and once it was back in spec I was now rubbing on the front bumper. I absolutely recommend waiting until you know if yours will rub before hacking away.

So the laws of physics don't apply to a 4runner. Interesting....

Didn't you hear the news about the deal Toyota made with the devil. Those puny laws only apply to Jeeps now.

Throwing my experience out there with my 2019 4runner TRD OffRoad Premium. I have a 2.75 in Toytec lift riding on 275 70 R17s. My tires rub with the stock rims and with aftermarket rims on full turn. I would think if you put too much castor into your alignment that you're going to get some float on the road if the wind blows just right. I have the JBA UCA installed that will allow more castor but then you're having to shave the front fender plastic. Does anyone have their alignment specs that they could share because I am about to do the Body mount chop as well and would like to avoid doing this. Thanks

I'm in a similar situation.... Got about a 2.75/2 Lift on dobinson's, After market rims 17x9 on 285/70/17, 1.25" spidertrax spacers. Rub the BM pretty bad. Plan on lifting the front a tad more with a spacer, and getting an alignment before I start chopping away. I'd like to get away from the BMC, but if I can't then it's getting chopped. Lots of info throughout the forum. Hopefully my alignment guy can do some magic.

☝🏼This. I have 285’s, Total Chaos UCA’s on a about a 2.5-3” lift with 1.25” Spidertrax spacers and did not need a BCM. I was prepared to get one, but took it to an alignment shop and had them give me an alignment with as much caster(?) as possible...pulling the wheels forward as much as possible while retaining the right specs. I’m no alignment experts but read lots of threads that indicated this could fix rubbing issues. Could...not would. As I understand it the aftermarket UCA’s are what give me the added flexibility in the alignment. Worked for me. Not sure if you have aftermarket UCA’s, but if not you could try that and a good alignment first.

If you want to try it without the spidertrax (you may like the stance to much to give that up), that may help with your solution without needing a BMC. I am not sure of your wheel specs as far as backspacing, etc. but if you get high caster UCA that will help dial more caster (wheel forward in wheel well) and get you away from the Body Mount!

It depends...
I'm running 285/75R17 on 8" wide rims and i have not yet experienced any rubbing and i do not have a BMC. I am running ICON suspension with 700lb springs in front and the overland springs in the rear.
YMMV

I'm running a +4.75 caster. It steers and tracks great. With 285/70 tires I have a ton of room to fit 285/75 or even a 315/70 with a BMC when I need to swap. No issues rubbing issues locked and stuffed.

FWIW I had zero issues with the 285/70 on stock rims with a +3.5 caster.

Not sure what you meant by float on the road with more caster, but in my experience the more positive caster, the better and less likely to wander all over the road like the truck is drunk.

Worked like a charm. I was stressing out about it too haha. No longer have the rub. Sad that I took out the spacers but I'll get over it. lol

I have JBA UCA, 17x9 Venomrex rims. Now only get the front fender rub which is easily fixable. Thanx for the info. Love this forum

One day you will return to the dark side.............. you'll see

and we will accept you with open arms

I just happen to get an alignment today after the JBA Standard UCAs were installed. I have about a 2.0-2.5" lift due to installing FJ TRD Pro suspension and a 1" spacer. They did an alignment when this was installed and said I was at 2.0 Caster and that I should probably consider UCAs. The vehicle drove fine so I just left it alone. Then about three weeks ago I put on SCS Stealth 6 custom wheels ( 17"x8.5" with -10mm offset) and KO2's 285/70/17. I had inner liner rub and front bumper rub at full lock. Easy enough fix. However after the wheel and tire install the 4R felt strange like too easy to turn and not planted. So I decided to put UCA's on after reading and re-reading comments on this board.

The vehicle drives great EXCEPT it now rubs the body mount. Very frustrating and I have no desire to do the chop. I'm going to call JBA tomorrow to see if they have any suggestions. In the meantime, all forum members are welcome to provide input

Attached Images

IMG_20190402_0001.pdf (579.1 KB, 86 views)

I haven’t proven this but my understanding is adding positive caster by adjusting the lower control arm moves the tire away from the body mount, adding caster with the upper control arm moves the tires closer to the body mount.