Ride Quality: BFG KO2’s, 20 vs 18 vs 17” ?

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Subscribed as I have the exact same question.
I am running LT275/55/20 E load BFG K02’s on the LX570 with front and rear ARB bumpers at 46psi. The ride is OK, not perfect. It is all I have known as I bought the vehicle this way. For my next tire I am on the fence about changing wheel size or tire brand/load rating for more on road comfort.
For me, I’m tending toward the Falken Wildpeak A/T3w in the same size. Not sure what load rating to go with.
 
I’m not talking about the width of the tire I’m talking about the width of the tread. I bought mine BFG showed it as a 1 inch difference I’ll post tire rack they show it as 1/2 inch difference in tread width.
View attachment 2234705View attachment 2234706

The 285 was mounted on a 9" wide rim.
The 275 was mounted on a 8.5" wide rim.

The 285 is simply stretched over a larger rim. The tire is not by any means 1" or even 1/2" wider. It is exactly 10mm wider. What's wider is the wheel the tire was mounted on for the above specs.
 
The 285 was mounted on a 9" wide rim.
The 275 was mounted on a 8.5" wide rim.

The 285 is simply stretched over a larger rim. The tire is not by any means 1" or even 1/2" wider. It is exactly 10mm wider. What's wider is the wheel the tire was mounted on for the above specs.
Interesting 😳
 
Just want to confirm...2019 stock LC with stock 18" rims. Size BFG KO2 285/60/18 Load Range D.

The pressure i am putting in is 46 psi. Correct psi?

The RCTIP for the LT285/60R18 KO2 tires on your 2019 LC200 is 46psi F/R.

HTH
 
Per Gaijin and TeCK, my LT285/70R17 Ridge Grappler, Load C, is at 35 PSI on my LX570. But it feels too soft. I'm running them in for 500 miles at that pressure for the carcass to move around and settle, really just to see if there are any production defects before I get out too far in the dirt. (I have seen too many belt shifts and bubble over the years to trust the whole 'we will give you a warranty claim' at any time. Yes, you vaunted Michelin.) Then I'll slowly go towards the RCTIP of 40psi.
 
Per Gaijin and TeCK, my LT285/70R17 Ridge Grappler, Load C, is at 35 PSI on my LX570. ... Then I'll slowly go towards the RCTIP of 40psi.

The RCTIP (Recommended Cold Tire Inflation Pressure) for the LT285/70R17 tires on your LX570 is 35psi, where do you get the RCTIP of 40psi?

You can run whatever you feel comfortable with, but just curious.
 
Hi, it was at the top range from the same chassis that you provided @ 40 psi for the Toyota 200 vs the Lexus 570/200 chassis at 35 psi. given the weights, weight balance, load are very similar (as are the rim specs). The main difference that I can see is Lexus' perceived need for comfort, the total spring rate range with ACS, and potentially that fact that they aren't used as loaded up as Toyotas.

Is there any substantive downside to going a couple pounds higher in the LX570, but well below max pressure?
 
Hi, it was at the top range from the same chassis that you provided @ 40 psi for the Toyota 200 vs the Lexus 570/200 chassis at 35 psi. given the weights, weight balance, load are very similar (as are the rim specs). The main difference that I can see is Lexus' perceived need for comfort, the total spring rate range with ACS, and potentially that fact that they aren't used as loaded up as Toyotas.

All this above is not correct.

Is there any substantive downside to going a couple pounds higher in the LX570, but well below max pressure?

You can certainly choose to run overinflated tires, but you will be subject to all the ills of doing so: uneven tire wear, increased braking distance, lower traction, etc. Your choice.

Toyota/Lexus designed the suspension systems with many engineering considerations in mind. These systems, comprised of several components of which tires are just one, are designed to perform best with 35psi on the LX570 and 40psi on the LC200 with the tires in question. If you choose to ignore all the engineering work put into the suspension system of your LX570 and choose a different pressure based on your opinion of, "Lexus' perceived need for comfort," then you would not be on solid engineering ground, and do so at your own risk.

HTH
 

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