Help! 285/70/r18 (TRD upgraded flat black wheels +45mm offset)

[Fishing]

I’m planning to upgrade tires soon, and after scouring the forums and Facebook groups (maybe I missed something), I haven’t found any concrete evidence on whether 285/70R18 tires will fit on the TRD upgraded rims (flat black, +45mm offset), specifically the (Falken Wildpeak AT4W in C load or the Toyo Open Country AT3 in E load) on a stock TRD Off-Road Premium without any suspension work (no leveling kit, spacers, etc.).

Fitment wise, it will probably clear, but the real question is whether it will rub at full lock. My 4Runner also still has the stock mudflaps, although I’m considering switching to ARK mid mudflaps. Will I need to remove anything?

Thank you!

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[RunnerRocks]

If you want a matching spare, consider whether the 285/70R18 tires you are considering will fit in the spare tire cavity.

I almost went with 285's. But stayed with 275's on our TRD PIO +45 option wheels.

I have five LT275/70R18 E-rated Toyo AT3's. For this tire, it appears to be the max size that will fit as a spare with little to no wiggle room. I'm not sure a 285 would fit.

Other members here have posted that 285's fit as a spare, some by modifying brackets, others while partially deflating.

 

[Fishing]

I keep a tire inflator in mines I wonder if keeping the spare slightly deflated would work. I did think about 275/70/18 that's definitely the safe route but I'm trying to see if 285 from those specific brands would work, I also wouldn't mind modding the spare tire area a bit

 

[RunnerRocks]

I keep a tire inflator in mines I wonder if keeping the spare slightly deflated would work. I did think about 275/70/18 that's definitely the safe route but I'm trying to see if 285 from those specific brands would work, I also wouldn't mind modding the spare tire area a bit

Check this thread...

Largest size spare tire fit in undermount carrier?

 

[Unlimited4R]

I am running the Falken Wildpeaks AT4 (load C) - 285/70 R18 with a full size spare underneath. It's about a 34" tire when not carrying the vehicle load. I made it fit by removing the rear tow point (supplementing with a hitch-mount tow loop when I off-road) and airing down to about 21 PSI (I have an onboard air compressor setup on mine as well).

If I'm swapping a tire on the trail, it's really a few more minutes of effort and energy to get it aligned without contact on the exhaust.

Up front, I used the Ark crash pad delete and removed the mud guards. No trimming, and a little rub at the moment when locked. The latter will be alleviated when I throw the new lift on it in a couple weeks (King's with Icon Land Cruiser springs).

 

[rutsnext]

Nice work on reading what’s already on the forum. Which means you may have come across some of my posts on a very similar setup. I have TRD ORP with same +45 offset TRD upgrade wheels. I went with 285/70/18 K03s.

I do have a 3/8” spacer (Greenlane), and while I did not try the wheel/tire setup without the spacer, it doesn’t appear that the 3/4” lift from the spacer would be what made the difference.
I did not have to remove the crash plate, which was important to me.
Kept the OEM mud guards. No issue at full lock.
I heard no occasions of rubbing at all, until I had a very light rub at just the right combo of braking that gave a bit of compression and half way around a 90 degree turn. On flat paved road turning into a lane way…lol.
I fully suspect it’s the small bump out on the mud flap. That’s visually the closest point if you look at the wheel through it’s turning travel. But it wasn’t enough rub to even leave an indication and it’s only happened twice so I haven’t done anything about it. I’ll take the hump off the oem mud guard before I replace them.
I’ve spent a good amount of time on Fire Service Roads in various states of condition. No problems with rub at any of the articulation I’ve experienced, but you’ll get a more knowledgeable elsewhere if you’re planning on serious crawling or wheeling.

My post on fitting the spare in the undermount was linked by RunnerRocks.

Toyo AT3 is the same size as the K03 in the 285/70/18. Falken E is bigger by about a 1/4”. Not sure about the Falken C. The 1/4” would make a difference in my opinion.

The 285/70/18 is the best option for keeping scrub radius from changing much vs the original setup if that’s something you’re considering. That was also important to me. I included a spreadsheet in an early post, I’ll see if I have a pic to post.

 

[zgreen]

If you want a matching spare, consider whether the 285/70R18 tires you are considering will fit in the spare tire cavity.

I almost went with 285's. But stayed with 275's on our TRD PIO +45 option wheels.

I have five LT275/70R18 E-rated Toyo AT3's. For this tire, it appears to be the max size that will fit as a spare with little to no wiggle room. I'm not sure a 285 would fit.

Other members here have posted that 285's fit as a spare, some by modifying brackets, others while partially deflating.

Hey Red Dog. On a side note, how are you liking those tires and that size? I'm thinking about getting those for the Pro here soon.

 

[SF6G]

I'm in a Pro running the factory wheels and just installed 285/70-18 AT3's on the 20mm offset wheels. Stock suspension with the OEM mud flaps and no rub except full lock in reverse. The minor rub in reverse doesn't bug me, so I don't plan on doing any other suspension mods for now. But we'll see down the road.
Non OE AT3's have a much better driving feel, in my opinion anyway. Glad I made the change.

 

[RunnerRocks]

Hey Red Dog. On a side note, how are you liking those tires and that size? I'm thinking about getting those for the Pro here soon.

These LT275/70R18 E-rated Toyo AT3's are perfect for our needs. Thought about 285's, but didn't want to create rubbing or spare storage issues.

We ran LT265/70R17 E-rated Toyo AT3's on our 2020 Ranger for 5+ years, often aired down off-road. They were great both on & off road. Still good gas mileage. Very little road noise even at highway speeds. No balance or wear issues. Big PLUS is that they are not rock magnets while off the blacktop.

Yes E-rated is a bit heavier but not that noticeable. This ORP has plenty of power to keep them rolling.

Like others, we have the ride harshness on sharp road seams, but that should go away with Fox 2.0's going on soon. The OEM suspension is great off-road and for most on-road. It swallows potholes and washboard fine. I just can't tolerate the jarring harshness on certain types of road & bridge seams.

Note that we have no experience in snow with these tires. They are certified for severe snow service and three-peak mountain snowflake rated.

 

[zgreen]

These LT275/70R18 E-rated Toyo AT3's are perfect for our needs. Thought about 285's, but didn't want to create rubbing or spare storage issues.

We ran LT265/70R17 E-rated Toyo AT3's on our 2020 Ranger for 5+ years, often aired down off-road. They were great both on & off road. Still good gas mileage. Very little road noise even at highway speeds. No balance or wear issues. Big PLUS is that they are not rock magnets while off the blacktop.

Yes E-rated is a bit heavier but not that noticeable. This ORP has plenty of power to keep them rolling.

Like others, we have the ride harshness on sharp road seams, but that should go away with Fox 2.0's going on soon. The OEM suspension is great off-road and for most on-road. It swallows potholes and washboard fine. I just can't tolerate the jarring harshness on certain types of road & bridge seams.

Note that we have no experience in snow with these tires. They are certified for severe snow service and three-peak mountain snowflake rated.

Thank you!

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