Tire Upgrade ?

Put the 285 70 18's on today with the lift, 18" KMC wheels (plus 18 offset) and sure enough they kiss the plastics slightly. So I removed the rear crash plate covers and mudflaps and all is good now. These Open Country AT3's are really nice but they run big at 33.74" inches. No vibration or weird anything going down the road. Running the PSI at 38 as recommended. Ride is nice.
Looks amazing. Congrats on dialing it in.
 
Side note on tire upgrade. I went to 33.74" tires and I checked the speed on my LC compared to waze app on my phone last night.. Im not sure how this is happening but my LC is correcting for tire size some how. At 70 mph the Waze app was also showing 70 mph. Is this possible? I always have to buy a programmer to recalibrate my speedo for tire size increases.
 
Side note on tire upgrade. I went to 33.74" tires and I checked the speed on my LC compared to waze app on my phone last night.. Im not sure how this is happening but my LC is correcting for tire size some how. At 70 mph the Waze app was also showing 70 mph. Is this possible? I always have to buy a programmer to recalibrate my speedo for tire size increases.
Had you looked at the speed on Waze before the tire upgrade? With stock 1958 tires mine shows about 10% higher on the speedo than on Waze. I think that Waze is correct.
 
Side note on tire upgrade. I went to 33.74" tires and I checked the speed on my LC compared to waze app on my phone last night.. Im not sure how this is happening but my LC is correcting for tire size some how. At 70 mph the Waze app was also showing 70 mph. Is this possible? I always have to buy a programmer to recalibrate my speedo for tire size increases.
This same thing happens on 5th gen 4runners and I think toyota already sets up their trucks for what they think people will fit.

My 4runner wasn't accurate with stock size wheels, but with 285, the speedo was now accurate. Same thing happened with my LC. When I put the 34s on, speedo was right on
 
My winter upgrade.
 

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Had you looked at the speed on Waze before the tire upgrade? With stock 1958 tires mine shows about 10% higher on the speedo than on Waze. I think that Waze is correct.
no. I never checked this until last night. I was worried it would be way off. Crazy that is is spot on now.
 
no. I never checked this until last night. I was worried it would be way off. Crazy that is is spot on now.
You might want to try a GPS Speedo app while not being connected to CarPlay or Android. My prior Wrangler on 35s would output the incorrect speedometer reading from the Jeep to any driving/navigation app I was running. Running a GPS Speedo app without being connected to CarPlay showed me the real speed I was traveling at. I haven’t tried this in the LC yet but something to keep in kind.
 
Note on the Cooper Road + Trail. I tried a set in 265/70 R18 SL and was impressed with their onroad feel and relative quietness as well as their feel off road. I wanted to keep them but 2 out of 5 tires couldn’t be balanced after 4 tries between two different shops. Always had a shake and vibrations over 65 mph. I could have tried swapping out the two bad ones but decided to change to the Yokohama G015. So far so good, but might sell these to wait on the Terra Grappler G3 in 275/70 R18. Both the Coopers and Yokohamas reduced my mpg by about 2-3 mpg. I still have my stock 20s and swap to those when I know I won’t need the AT’s anytime soon.
 
One of my biggest gripes about the LC is that they made it a hatchback and put the spare under the truck. What was wrong with the swinging door with tire carrier on back of truck I don't know, but they thought of so many great improvements for the LC but then turn around and make it a damned hatchback.
 
I am sorry if this has been addressed before, but are there any issues changing to 17" wheels from the 18"? I have heard something about the brakes related to this.
I like a skinnier tire and 17" seems to have better options in that regard. I like this look @kerner with the 255/80/17. Basically a 33" x 10". Probably keeps the mpg's pretty good too.
 
I am sorry if this has been addressed before, but are there any issues changing to 17" wheels from the 18"? I have heard something about the brakes related to this.
I like a skinnier tire and 17" seems to have better options in that regard. I like this look @kerner with the 255/80/17. Basically a 33" x 10". Probably keeps the mpg's pretty good too.
there are a lot of people running 17" wheels on the new LC with zero problems. The options for 17" tires vs. 18" tires is better by far as well as the prices. I just can't seem to find a 17" wheel that is in the offset range I'd like to have. If I could find one in a +40-+50 range I'd be all over it.
 
He has done a +25 offset above (@kerner) I think. What is the offset without messing with the truck? Like neutral and OEM. Is it 0?
I am trying to understand offset and what the baseline is for our Land Cruiser. Positive is moving it outward and negative is moving inward towards middle of truck?
 
He has done a +25 offset above (@kerner) I think. What is the offset without messing with the truck? Like neutral and OEM. Is it 0?
I am trying to understand offset and what the baseline is for our Land Cruiser. Positive is moving it outward and negative is moving inward towards middle of truck?
Standard trim rims are +60 offset. Easiest to understand is the more positive the offset the closer the wheel is to the body of the vehicle. The more negative the offset the more the wheel moves away (pokes out) from the body of the vehicle. The more the wheel pokes out the smaller the tire has to be to fit in the wheel well without rubbing.

The genius of the 255 r80 tire is that it is tall while still being skinny. It will still fit with a +25 mm offset rim. A 34 or even a 35 inch tire will fit with an offset more than +40 without rubbing. Under +40 and tires over 275 r70 are much more likely to rub inside the wheel well.

Skinnier tires are actually better off-roaders than wider tires. Most people just don’t like the look.
 
Standard trim rims are +60 offset. Easiest to understand is the more positive the offset the closer the wheel is to the body of the vehicle. The more negative the offset the more the wheel moves away (pokes out) from the body of the vehicle. The more the wheel pokes out the smaller the tire has to be to fit in the wheel well without rubbing.

The genius of the 255 r80 tire is that it is tall while still being skinny. It will still fit with a +25 mm offset rim. A 34 or even a 35 inch tire will fit with an offset more than +40 without rubbing. Under +40 and tires over 275 r70 are much more likely to rub inside the wheel well.

Skinnier tires are actually better off-roaders than wider tires. Most people just don’t like the look.
Thank you for the excellent explanation. I had it reversed, and was not sure about details regarding poke and rubbing related to offset. And I had heard the same about skinny tires being better for off-road, although it seems to defy logic.
 
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