Can I fit 285/70/17s?

I have a 2019 TRD Off Road with Bilstein 5100s at the highest setting. Currently have 275/70/17s. Could I fit 285/70/17s without adding anything else?

 

On stock OR wheels? You can, but you’ll get a lot of rubbing probably. If you’re maxed out on the 5100’s you’re sitting around 2.5” of lift. There’s some people on here that fit 285’s without any fitment mods but have a full 3” of lift with UCA’s for alignment adjustment.

 

There are people who can fit 285's on a stock runner with no lift.

285 fitment has more to do with wheel specs and alignment numbers, not necessarily lift height.

What wheels are you running? If they are aftermarket, do you know the wheel specs?

 

Fitment is one thing, but getting functionality is another

 

Sure, but how does a lift improve tire fitment functionality on our trucks?

 

You’re telling me that a 285 will function better on a stock height 4runner than a 4runner with 3” of lift? A 285 is fine to run to the mall, but hit any trail and soon that 285 can become less useful than stock tires as they’ll stuff quicker and probably rub and limit your suspension travel.

 

Define better. What is the 3" lift doing for you?

 

I’ll agree to disagree for the sake of not writing a thesis paper

 

Stock OR Wheels

 

Stock OR Wheels

 

Here's where I'm coming from.....

The amount our suspension travels does not change with a lift.

So lets say (hypothetically) right off the lot we have 6" of suspension travel in the front, with 3" of up travel and 3" of down travel.

You lift that vehicle 2 inches. Now that your static ride height is 2 inches higher. You've changed the way your suspension travels through its range of travel, but you haven't actually changed the amount of travel. So now instead of having 3" of down travel, you have 1" of down travel and instead of having 3" of up travel, you have 5" of up travel. Your wheel travel is still in that same 6" range as it was stock.

You put 285's on and your tire still travels within that same range. You haven't done anything to change that travel range........so the lift doesn't really matter.

Lift height can improve approach and departure angles though, so there is some benefit there.

 

I never mentioned increasing travel, rather limiting. However with your train of thought, a stock OR with 285’s should yield the same up and down travel as one with a 3” lift? If your on an off camber trail, in my mind a stock height runner with 285’s wouldn’t fair well against a lifted one. I’m no expert in this, but that’s just my thought.

 

I did not say that you would have the same up and down travel stock vs. a 3" lift. The amount of down travel decreases when you lift our trucks and the amount of up travel increases. But your range of travel would still remain the same stock vs a 3" lift.

Where are you limiting travel with 285's?

 

That's good. It makes things a little easier.

Do you have aftermarket UCA's?

 

My thought with limiting the travel would be that when you’re on an off camber trail, and you’re stuffing one tire and the other is dropping, you won’t get as much flex/travel because the tire has a bigger sidewall so it’ll hit the wheel well faster than a smaller tire would. So it’s not allowing the vehicle to move as much due to restricted space. Again, no expert but just formulating my thoughts on what would happen!

 

I think what @nimby is saying is that the upper limit of travel remains the same with a lift. So, even though you clear in everyday driving, the tire might still rub when stuffed. That's why the alignment and trimming are usually necessary.

 

You're right, you definitely have more opportunity to do so in that situation vs a 265. The sidewall on a 285 is roughly 0.5" higher than a 265, so you might have to accommodate for 0.5".

I'm not advocating to do extreme flexing offroad on a stock 4Runner with 285s. I'm just saying that lift height isn't the determining factor on whether you'll rub.

 

Yes! Thank you.

 

100%
That’s what I said in the beginning, mall trips will be fine but if you do any trail runs then they probably won’t work since they’re wider and taller lol.

 

Looks like sticking with 275 is the way to go

 

Haha! Don't let our conversation dissuade you.

It's not very hard to run 285's.

With your set-up, you might rub your mudflap a bit, but a heat gun or mudflap removal would probably solve any rubbing issues you have.

 

I have 285/70/17's on 2.3" lift in front. I rub mud-flap while backing up and turning, but otherwise only notice it once when I bottomed out hard off-road.

I also have a BMC but I've heard of people clearing without it.

You should be fine if you get the alignment shop to max out caster.

 

I have 285/70/17 on a 1.6" lift in front. Caster pushed up to 3.6 degrees and the fender liner mod. No rubbing, but I'm not rock crawling either.

My point is you don't have to have a big lift to have the same amount of clearance from the top of your tire to the bottom of your fender liner. 285's are taller by roughly 0.5" (sidewall height). So if you lift your truck 0.5", you have roughly the same amount of vertical clearance a 265 has. This is assuming stock wheel specs because aftermarket wheel specs can definitely change your tire clearance.

But I think this is an interesting topic and I'd like to continue the conversation. A lot of us offroad differently and a situation where one person rubs, someone else may not. For those of you who do rock crawl and you're constantly stuffing tires, I'm curious to know if 265's will rub on the top of your fender liner while flexing or do they typically clear?