Wanted to confirm my calculations for a '13LC for BFG KO3 LT-E 285/75/17 at 37-38lbs.
Tire Pressure recommendation
- Thread starter terdrocket
- Start date
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Confirmed!
The RCTIP for those LT285/75R17 E tires on your LC200 is 37psi F/R.
HTH
Excellent, thank you
LCT
SILVER Star
@gaijin can you by any chance calculate the RCTIP for a 100 series (2005 LX470)?
Tires: Toyo RT Trail LT295/70R18 129Q E1
Wheels: BBS forged 18” trd pro wheels
Tires: Toyo RT Trail LT295/70R18 129Q E1
Wheels: BBS forged 18” trd pro wheels
Sorry, I only do LC200; but all the info you need to do the calcs yourself can be found here:
Guidelines for the Application of Load and Inflation Tables
Or the "easy button" solution is here:
Tire Pressure Calculator
HTH
LCT
SILVER Star
Thank you!!!
Hello @gaijin
Can you please let me know the RCTIP for a 2019 LC with Yokohama Geolander M/T G003 285/70/18 127/124Q 10R’s. On OEM RIMS WITH .75” bora spacers.
Thanks in advance!
Can you please let me know the RCTIP for a 2019 LC with Yokohama Geolander M/T G003 285/70/18 127/124Q 10R’s. On OEM RIMS WITH .75” bora spacers.
Thanks in advance!
Sure!
I assume you meant these LT-Metric tires:
If so, the RCTIP for those LT285/70R18 tires on your LC200 is 38psi F/R.
HTH
Yes - LT…..thanks so much!
Trying to confirm if I did my math right for a 2011 LX.
Tires: MICHELIN DEFENDER LTX M/S2 LT285/70R17 126S E
Wheels: Dakar Zero 17x8 ET40
RCTIP should be 35 psi? Thanks in advance.
Tires: MICHELIN DEFENDER LTX M/S2 LT285/70R17 126S E
Wheels: Dakar Zero 17x8 ET40
RCTIP should be 35 psi? Thanks in advance.
Yes, your math is correct.
FYI, the same tires on an LC200 have an RCTIP of 40psi. Depending on your particular tastes, you may find your sweet spot somewhere between the two.
HTH
The Toyo Tire Load/Inflation table says 25psi, so if that's what you came up with - you did it correctly.
38" Floatation tires are so far outside the Toyota design criteria that the practical tire pressure best for your use case will come down to your judgement on what is safe and works for you.
HTH
I’m curious why this is? The two different numbers are derived almost exclusively from the stock tire size that comes on these two different vehicles (if I’m not mistaken). But the LX570 and LC200 have almost exactly the same GVWR.
Toyota/Lexus engineered the suspensions on the two vehicles to provide optimum safe performance with different tire spring rates (i.e. tire pressures). Different vehicles, different suspensions, different engineering considerations from the manufacturer - simple as that.
HTH
RCTIP only answers for what the tire needs to not overheat when carrying a load. There are other factors involved especially when a tire like the one in question has much more load capacity.
Same reason why the base LC vs LX OEM inflations pressures were never solely about load capacity and derive to different numbers. RCTIP should always be taken with a grain of salt as there are no absolutes. Tire pressure can be tailored to actual load and driving style.
As I run a 37x12.5R18 LT-E that is much closer to your tire in question...
Minimum should be the door placard at 33PSI but the ride is mushy with tires easily rolling over at that pressure. At least on my 8.5" wide wheels. In the LX, majority of body roll is the tires themselves and this is probably not a safe pressure when talking about rollover potential in an evasive maneuver.
36-39 works much better for stability at speed and a good place to be for long road-trips, with the higher end of that when laden on trips.
39-42 is great for canyon carving and can carry much more speed into corners without sidewall rolling over and traction control kicking in.
44-46 when really laden to max GVWR and towing.
I'm toying with the idea of going to that specific tire and tire size - 38x13.5R18LT Toyo RT Pro