18” OEM size - Tire alternatives

DenisLM

DenisLM

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May 21, 2024
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Maple Valley, WA
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2024 Land Cruiser LC premium
Thinking about replace the original Michelin with some AT4W SL or something else (KO3 maybe)
Keeping the OEM size and wheels.
I’ve seen a few pictures here and there but would be nice add to a single thread for future reference.
Please anyone share your thoughts about how was the drive before and after, potential MPG losses and so on.
And pictures! Because that’s another big part of the equation!
 
I think you'll find a a treasure trove of information in this active thread - Tire Upgrade ?

But since you asked so nicely, here's my stock size A/T4W SL on OEM 18" wheels.
IMG_8698.jpeg
 
TrailWhale said:
I think you'll find a a treasure trove of information in this active thread - Tire Upgrade ?

But since you asked so nicely, here's my stock size A/T4W SL on OEM 18" wheels.
View attachment 7003
Click to expand...
I looked into that thread and found a few posts about it
But there’s 30+ pages of everything
Becomes hard to find some specifics as OEM size on OEM wheels

That said this looks so much better than the OEM tires, and also looks bigger as well.

Thanks for the share.
 
DenisLM said:
That said this looks so much better than the OEM tires, and also looks bigger as well.
Click to expand...
It definitely looks a lot beefier. It is supposed to be the same size, and I never actually measured, but I agree, they do feel a bit bigger, but that might just an illusion because of their stance.

IMG_8850 copy.jpeg
 
Here’s mine. Also 265/70-18 SL AT4W’s, on First Edition OEM 18”.

Ride before was smooth to the point of boaty. After you can feel the weight in a more solid and planted drive. But still the same overall feel.

MPG dropped by 1 to 2 mpg. Getting 21.1 combined city/highway now.
 

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ZeaStardust said:
I’m thinking of getting that size KO3. Any wheel rub? Did you replace the spare with the same size? If yes, did it fit? The center caps look great.
Click to expand...
No rub, no issues. I did NOT do the spare because I would just use it in a pinch. The KO3s will hang down more and create more drag, without question. I will just rotate the 4 and be satisfied.
 
Interesting how the ko3 275 size looks like the AT4W 265...
Granted the difference on paper is minimal, visually looks about the same
 
DenisLM said:
Thinking about replace the original Michelin with some AT4W SL or something else (KO3 maybe)
Keeping the OEM size and wheels.
I’ve seen a few pictures here and there but would be nice add to a single thread for future reference.
Please anyone share your thoughts about how was the drive before and after, potential MPG losses and so on.
And pictures! Because that’s another big part of the equation!
Click to expand...
See these threads and the spreadsheet in the second one / in my signature which is in part an attempt to condense the info in the first thread:

Tire Upgrade ?

How large can you go on a stock 1958 edition ?
www.landcruiserforum.com www.landcruiserforum.com

Tire (and a few wheel) options spreadsheet

I see people hunting for this spreadsheet, maybe it should have a post of its own. (But also please see/search the Tire Upgrade thread!) I started compiling info on tire options while waiting for a Land Cruiser, shared the spreadsheet, and people say it's helpful. So here you go. This...
www.landcruiserforum.com www.landcruiserforum.com
 
Last edited:
ZeaStardust said:
I’m thinking of getting that size KO3. Any wheel rub? Did you replace the spare with the same size? If yes, did it fit? The center caps look great.
Click to expand...
Several folks have reported that 275/70R18 heavy duty off-road tires fit (just barely) in the spare tire location. It does hang down a bit more. A few people have said 285/70R18 fits, but take that with a grain of salt.
 
Markarian421 said:
Several folks have reported that 275/70R18 heavy duty off-road tires fit (just barely) in the spare tire location. It does hang down a bit more. A few people have said 285/70R18 fits, but take that with a grain of salt.
Click to expand...

Correct. The KO3s will fit in the spare, but the wider width of the tire will add additional drag and be more noticeable. To me, that wasn’t worth doing all 5.
 
OsageCowboy said:
Correct. The KO3s will fit in the spare, but the wider width of the tire will add additional drag and be more noticeable. To me, that wasn’t worth doing all 5.
Click to expand...
In the tire puncture situations, the spare stock wheel and tire can limp home with three other 275/70R18 KO3s ?
 
sids911 said:
In the tire puncture situations, the spare stock wheel and tire can limp home with three other 275/70R18 KO3s ?
Click to expand...
If you have to, I wouldn’t advise more than an inch different in diameter and I would definitely not lock the differential. If you are going to do any serious wheelin you should have plugs and an air compressor.
 
BKLC said:
How much did this lower your MPG?
Click to expand...
Well I also have the roof rack cross rails (before yet installing the Westcott rack), so it’s hard to say. I anticipate the Westcott rack may improve the mpg by an mpg or two. The cross rails definitely cause drag at the 70-80mph speed range.
 
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