Whats your avg tire psi?
04-17-17, 01:57 PM
#16
Normal pressure is 36 psi.
04-17-17, 03:18 PM
#17
Instructor
The recommended tire pressure is based on the vehicle AND the tire size. Once you deviate from one of them (typically the tire size), then the recommended pressure no longer applies...you're on your own at that point.
There are vehicles that come in different engine/drivetrain configurations, and depending on how the vehicle is equipped will change the tire pressure, even the pressure from front to rear in some cases.
It just so happens that the 3IS, no matter the engine or wheel/tire configuration, the recommended pressure is 36PSI all around.
Some owners manuals even recommend increasing the tire pressure by a specific amount if you will be driving faster that a specific speed (i.e if you are consistently driving over 160 kmph, increase the tire pressure by 5 PSI)
There are vehicles that come in different engine/drivetrain configurations, and depending on how the vehicle is equipped will change the tire pressure, even the pressure from front to rear in some cases.
It just so happens that the 3IS, no matter the engine or wheel/tire configuration, the recommended pressure is 36PSI all around.
Some owners manuals even recommend increasing the tire pressure by a specific amount if you will be driving faster that a specific speed (i.e if you are consistently driving over 160 kmph, increase the tire pressure by 5 PSI)
1, The STicker on the side of your driver door does mean something, 2014-2015 3IS recommended 36 psi all around at normal driving condition daily commute for instance, you can increase psi from min 36 psi to 40 depend on what you do where you drive, if you go for Track of course 40 psi+ maxed is recommended by the Tires manufacture, Toyota Lexus do not recommend for STun driving burn out or donut etc. (abusive driving).
2, Your tires psi will automatically increases psi itself from 4-8 psi after DRIVING FOR 15 mins+ according to the weather, cold = 4-5 psi increase, hot = 8-10 psi increase max out will be 11-12 psi depend on what brand and type of tires.
3, Tires Manufacturing tells you by putting the letters on their tires "DO NOT MAX OUT 50 PSI" that's not a recommendation it's a "WARN"
2006-2010 Lexus IS psi = 35 front 37 rear / 2011-2013 Lexus IS psi = 35 front 38 rear / 2014+ Lexus IS 36 all around , you can go up to 2-3 more PSI don't go too much or too low or it causes tires premature wears, weight of vehicle and design does affect tires pressure and driving experience, tires don't look anything big to you BUT THEY ARE THE MAIN GUY of the car's component
in some case like you have experience with bouncy tires or noise or vibration, the 1st you will have to check is TIRES PRESSURE, for example like if you have vibration while driving on highway, try to decrease psi by -1 if not -2, if you have noise etc. increase psi to +1 or 2 just don't go over 3 psi based on Lexus recommended always within OEM specs.
Just bought a brand new set of YOkohama Made in Japan myself and had vibration issue re-balance 2 times and it's still there, my Shop told me to ROADForce balance, you know what ? i decreased psi by -2 and the vibration gone, now my car drive smooth like a USS-Vinson warship, Ok lastly, we are Lexus fellas we talk about Lexus and we help each others fix Lexus, don't bring other Car like Ford or Nascar BMW Audi etc in the story, we're totally different CHASSIS and weight thus the PSI will not be the same, it's a common sense for tires that, If you put too much pressure you'll get vibrate, if you put too less you get sloppy drive even steering pulls Thank you.
Last edited by Solara350; 04-17-17 at 03:21 PM.
04-17-17, 03:22 PM
#18
you can get better traction in snow/ice/sand/mud with lower pressures...when I take my truck to the dunes or when I was in alaska winters, I dropped psi to 20 or less....higher speeds want higher pressures
04-17-17, 03:25 PM
#19
Instructor
Certainly ! it's the trick that drivers been doing for the last 30 years, lower your pressure its good for BIG RAIN or SNOW of course. Totally true !
04-17-17, 03:44 PM
#21
Instructor
another good point, Its true that high PSI improves MPG but too much psi will cause premature wears. Ya city driving is pain with potholes.
04-17-17, 04:39 PM
#22
Lexus Test Driver
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You're wrong on this one bro !
1, The STicker on the side of your driver door does mean something, 2014-2015 3IS recommended 36 psi all around at normal driving condition daily commute for instance, you can increase psi from min 36 psi to 40 depend on what you do where you drive, if you go for Track of course 40 psi+ maxed is recommended by the Tires manufacture, Toyota Lexus do not recommend for STun driving burn out or donut etc. (abusive driving).
2, Your tires psi will automatically increases psi itself from 4-8 psi after DRIVING FOR 15 mins+ according to the weather, cold = 4-5 psi increase, hot = 8-10 psi increase max out will be 11-12 psi depend on what brand and type of tires.
3, Tires Manufacturing tells you by putting the letters on their tires "DO NOT MAX OUT 50 PSI" that's not a recommendation it's a "WARN"
2006-2010 Lexus IS psi = 35 front 37 rear / 2011-2013 Lexus IS psi = 35 front 38 rear / 2014+ Lexus IS 36 all around , you can go up to 2-3 more PSI don't go too much or too low or it causes tires premature wears, weight of vehicle and design does affect tires pressure and driving experience, tires don't look anything big to you BUT THEY ARE THE MAIN GUY of the car's component
in some case like you have experience with bouncy tires or noise or vibration, the 1st you will have to check is TIRES PRESSURE, for example like if you have vibration while driving on highway, try to decrease psi by -1 if not -2, if you have noise etc. increase psi to +1 or 2 just don't go over 3 psi based on Lexus recommended always within OEM specs.
Just bought a brand new set of YOkohama Made in Japan myself and had vibration issue re-balance 2 times and it's still there, my Shop told me to ROADForce balance, you know what ? i decreased psi by -2 and the vibration gone, now my car drive smooth like a USS-Vinson warship, Ok lastly, we are Lexus fellas we talk about Lexus and we help each others fix Lexus, don't bring other Car like Ford or Nascar BMW Audi etc in the story, we're totally different CHASSIS and weight thus the PSI will not be the same, it's a common sense for tires that, If you put too much pressure you'll get vibrate, if you put too less you get sloppy drive even steering pulls Thank you.
1, The STicker on the side of your driver door does mean something, 2014-2015 3IS recommended 36 psi all around at normal driving condition daily commute for instance, you can increase psi from min 36 psi to 40 depend on what you do where you drive, if you go for Track of course 40 psi+ maxed is recommended by the Tires manufacture, Toyota Lexus do not recommend for STun driving burn out or donut etc. (abusive driving).
2, Your tires psi will automatically increases psi itself from 4-8 psi after DRIVING FOR 15 mins+ according to the weather, cold = 4-5 psi increase, hot = 8-10 psi increase max out will be 11-12 psi depend on what brand and type of tires.
3, Tires Manufacturing tells you by putting the letters on their tires "DO NOT MAX OUT 50 PSI" that's not a recommendation it's a "WARN"
2006-2010 Lexus IS psi = 35 front 37 rear / 2011-2013 Lexus IS psi = 35 front 38 rear / 2014+ Lexus IS 36 all around , you can go up to 2-3 more PSI don't go too much or too low or it causes tires premature wears, weight of vehicle and design does affect tires pressure and driving experience, tires don't look anything big to you BUT THEY ARE THE MAIN GUY of the car's component
in some case like you have experience with bouncy tires or noise or vibration, the 1st you will have to check is TIRES PRESSURE, for example like if you have vibration while driving on highway, try to decrease psi by -1 if not -2, if you have noise etc. increase psi to +1 or 2 just don't go over 3 psi based on Lexus recommended always within OEM specs.
Just bought a brand new set of YOkohama Made in Japan myself and had vibration issue re-balance 2 times and it's still there, my Shop told me to ROADForce balance, you know what ? i decreased psi by -2 and the vibration gone, now my car drive smooth like a USS-Vinson warship, Ok lastly, we are Lexus fellas we talk about Lexus and we help each others fix Lexus, don't bring other Car like Ford or Nascar BMW Audi etc in the story, we're totally different CHASSIS and weight thus the PSI will not be the same, it's a common sense for tires that, If you put too much pressure you'll get vibrate, if you put too less you get sloppy drive even steering pulls Thank you.
And to clarify, the reference to 160kmph and adding 5 PSI...it's from the owners manual for a 2008 Toyota Highlander...a vehicle from the same family of manufacturer as Lexus and Scion.
04-17-17, 05:34 PM
#23
Instructor
You are certainly entitled to your own opinion, however, I'm not sure how you got at that from the few lines I typed.
And to clarify, the reference to 160kmph and adding 5 PSI...it's from the owners manual for a 2008 Toyota Highlander...a vehicle from the same family of manufacturer as Lexus and Scion.
And to clarify, the reference to 160kmph and adding 5 PSI...it's from the owners manual for a 2008 Toyota Highlander...a vehicle from the same family of manufacturer as Lexus and Scion.
04-18-17, 11:37 AM
#26
I consider what the car sticker says and what the tires will allow, and just put the psi where I want it based on what kind of ride I want. Generally speaking I like 36-38 as a balance between ride and performance. I don't think there is a magic right answer short of staying away from a safety issue (too low or too high).
04-18-17, 06:27 PM
#27
Instructor
I consider what the car sticker says and what the tires will allow, and just put the psi where I want it based on what kind of ride I want. Generally speaking I like 36-38 as a balance between ride and performance. I don't think there is a magic right answer short of staying away from a safety issue (too low or too high).
04-18-17, 08:06 PM
#28
drives cars
I consider what the car sticker says and what the tires will allow, and just put the psi where I want it based on what kind of ride I want. Generally speaking I like 36-38 as a balance between ride and performance. I don't think there is a magic right answer short of staying away from a safety issue (too low or too high).
