Tyre pressure

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Tyre pressure

Postby Toeknee2 on Wed, 08 Feb 2017 9:21 +0000

Hi guys.
Just thought I would get some correct information out there regarding the current hilux models (most of you should already know this).

Under normal vehicle operating (ie. not carrying a heavy load) the Toyota handbook recommends a tyre pressure (for both the 17" and 18" rims) of 29psi, front and back (that's 200kPa).

When your new car is delivered the tyres are usually pumped up to a staggering, back-breaking 50psi!
Save your back guys and let some air out.
Twenty nine.

Cheers,
Tone
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Re: Tyre pressure

Postby barryswanson on Wed, 08 Feb 2017 12:10 +0000

The last three cars I have bought off Toyota have had over inflated tires. My current car came with 40 psi my last Prado came with 60 and so did the previous hilux. I have asked a few people why including tire fitters and car shipping people and both had plausible explanations. The tire fitters told me it's common practice to inflate that high to ensure correct seating of bead on rim. I was also told because they are parked so close on the boat it avoids any additional rocking of cars in rough seas. I'm not sure about the latter but the former makes more sense to me.
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Re: Tyre pressure

Postby Sparksy on Wed, 08 Feb 2017 4:48 +0000

Yep, this is very true. When I got mine new, I thought the ride seemed a bit harsh but chalked it up as to having an empty tray. Checked pressure next time I was at the servo and they'd cranked it up to 46-47 on every wheel. Bit much!
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Re: Tyre pressure

Postby Hutch on Wed, 08 Feb 2017 7:20 +0000

I run 36 psi hot about 32 cold...
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Re: Tyre pressure

Postby Scottbags on Wed, 08 Feb 2017 8:00 +0000

barryswanson wrote:The last three cars I have bought off Toyota have had over inflated tires. My current car came with 40 psi my last Prado came with 60 and so did the previous hilux. I have asked a few people why including tire fitters and car shipping people and both had plausible explanations. The tire fitters told me it's common practice to inflate that high to ensure correct seating of bead on rim. I was also told because they are parked so close on the boat it avoids any additional rocking of cars in rough seas. I'm not sure about the latter but the former makes more sense to me.


I may be able to add to the info above as I work on the last remaining fully automated tyre fitment production line in the country.

The high pressure is for the first reason above. We pump to 50psi in about 1 second (around the bead, not through the valve). This is to seat the tyre correctly on the rim.
The assembly then remains at that pressure through vehicle assembly, shipping, transport etc.
I've also been told from 2 different sources, that the high pressures are not reduced by the car manufacturer because it helps prevent flat spots forming on cars that sit around for too long.

Poor dealer pre-delivery is why some of you are driving on tyres as hard as rocks.
"Whether you think you can, or think you can't - you're right." - Henry Ford
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Re: Tyre pressure

Postby adamkberger on Thu, 09 Feb 2017 2:36 +0000

Good tip. I checked mine last night and they were at 40psi. My Hilux is now 14 months old and I've never checked them. No wonder it's so harsh!
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Re: Tyre pressure

Postby Rocket55 on Thu, 09 Feb 2017 4:34 +0000

Yep, that's your $1,575 deal pre delivery charge at work, they don't even check the tyre pressures....
Cheers Rod
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Re: Tyre pressure

Postby creaky on Thu, 09 Feb 2017 9:30 +0000

adamkberger wrote:Good tip. I checked mine last night and they were at 40psi. My Hilux is now 14 months old and I've never checked them. No wonder it's so harsh!


LOL, 14 months !
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Re: Tyre pressure

Postby adamkberger on Thu, 09 Feb 2017 11:37 +0000

creaky wrote:
adamkberger wrote:Good tip. I checked mine last night and they were at 40psi. My Hilux is now 14 months old and I've never checked them. No wonder it's so harsh!


LOL, 14 months !


6600km on the clock also!
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Re: Tyre pressure

Postby DeadlyBeast on Thu, 09 Feb 2017 6:25 +0000

Good on ya for being honest but get prepared for the "give your self an upper cut" comments :lol:
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Re: Tyre pressure

Postby Hutch on Thu, 09 Feb 2017 6:34 +0000

40psi u feel every ripple in the road, once they heat up probably go to 44?? That is why I am running 32, much more comfortable.


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Re: Tyre pressure

Postby barryswanson on Thu, 09 Feb 2017 6:47 +0000

Hutch wrote:40psi u feel every ripple in the road, once they heat up probably go to 44?? That is why I am running 32, much more comfortable.


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I agree, I run 32 psi also. 29 seems just a tad too low for cornering etc.
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Re: Tyre pressure

Postby Kris NT on Thu, 09 Feb 2017 8:05 +0000

I just checked mine 35psi in all 4 tyres
I lowered them to 30psi... I don't carry any loads and the hot weather and roads up here in the NT the tyres probably heat up 20psi when hot.
If it has tits or wheels ....it'll cost ya money
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Re: Tyre pressure

Postby garryc on Fri, 10 Feb 2017 6:00 +0000

Be gentle coz this is only my second post after introduction.
Must have got my money's worth for my pre delivery. Tyre pressure set at 30 psi.
Looking for recommendations about pressures.
How far would you drive on a sealed road after airing down for beach driving.
I like the idea (read lazy) of deflating to 18psi at home (5kms from beach)
After beach driving, drive home, 5 kms again, and re inflating with compressor in shed rather than the small compressor I carry in the car

thanks
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Re: Tyre pressure

Postby creaky on Fri, 10 Feb 2017 8:19 +0000

So long as you go slow, especially around corners.
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Re: Tyre pressure

Postby Toeknee2 on Sat, 11 Feb 2017 4:19 +0000

6600km / 14 months :oops:

Every 4x4 owner should own a quality pressure gauge. I have a Hafner gauge, $29 delivered (Ebay).
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Re: Tyre pressure

Postby adamkberger on Sun, 12 Feb 2017 8:32 +0000

I finally took my Hilux for a spin today after dropping tyre pressures to 30psi. What a difference! It feels like I'm driving a cloud vs driving a brick.
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Re: Tyre pressure

Postby Toeknee2 on Sun, 12 Feb 2017 3:17 +0000

:D
Great to hear. It does make a difference, I felt it straight away as well.
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Re: Tyre pressure

Postby Hutch on Sun, 12 Feb 2017 5:25 +0000

Yep 30-32 seem like the magic number....
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Re: Tyre pressure

Postby PCB on Sun, 12 Feb 2017 6:40 +0000

2014 SR5 on standard rims and tyres. Ran 40PSI after doing advanced driver training (yep in the Lux) and at 32 the tyres really squealed but at 40 it handled better. Problem was car unladen the kids bounced around the back seat (they thought it was great but the boss felt it was too rough). Put BFKO2's on and ran 40 and still really bouncy so dropped to 32 unladen. Still bounces but much better than 40.

PS. Anyone thinking of new tyres- the BF AT KO2's after 12,000 kms are quieter than the standard HT's and they grip so well sometimes the car is dangerous as you go to take off in the wet the ute takes a sec to take off now as the tyres grip that well. Only driven on unsealed gravel and some sand and very happy with them.
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