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 Tyre air - is it a must to follow exactly?

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zeng
post Jul 2 2017, 01:18 PM

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QUOTE(samurai_ghost @ Jun 30 2017, 11:58 AM)
My understanding will be OEM tyre. Tyre originally fitted in upon purchasing the car.

I don't think same pressure applicable with tyre with same range / size. Unless exact same brand, size & model.

Eventhough same range / size, different tyre manufacturer or even different model will be using different compound, soft / hard sidewall, etc. That contribute to optimum tyre pressure.

Not so expert lah. Based on my experience & reading only. smile.gif
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Unfortunately I beg to differ on this.

This post has been edited by zeng: Jul 2 2017, 01:20 PM
iverice
post Jul 11 2017, 04:57 PM

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like for avanza in the manual only said front 210kpa rear240kpa, it did not show any load or no load condition just a table stated this pressure.
so follow it?
also the tyre change from stock 185 65 r15 to 195 60 r15
so thr tyre pressure how now?
zeng
post Jul 13 2017, 10:17 PM

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QUOTE(iverice @ Jul 11 2017, 04:57 PM)
like for avanza in the manual only said front 210kpa rear240kpa, it did not show any load or no load condition just a table stated this pressure.
so follow it?
also the tyre change from stock 185 65 r15 to 195 60 r15
so thr tyre pressure how now?
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I believe these two tyre sizes 'happen' to have the same load index, therefore same OEM recommended tyre pressures for both front and rear would be applicable.
However in my 1.3 Avanza, I select over-pressure of 275 kpa in all 4 tyres for agility and fuel economy.

This post has been edited by zeng: Jul 13 2017, 10:19 PM
iverice
post Jul 14 2017, 04:59 PM

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QUOTE(zeng @ Jul 13 2017, 10:17 PM)
I believe these two tyre sizes 'happen' to have the same load index, therefore same OEM recommended tyre pressures for both front and rear would be applicable.
However in my 1.3 Avanza, I select over-pressure of 275 kpa in all 4 tyres for agility and fuel economy.
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275kpa for avanza is just too much man
zeng
post Jul 14 2017, 07:11 PM

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QUOTE(iverice @ Jul 14 2017, 04:59 PM)
275kpa for avanza is just too much man
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Yes, it's on the high side for Avanza's weight and it's recommended 210 front 240 kpa rear.
But, it's way below the tyre's maximum allowable weight/air-pressure of 310 kpa.
No uneven tyre wear though. dry.gif
geolee76
post Aug 8 2017, 10:00 PM

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how do i know how much psi need to pump in...
which label to check on my tyre. is it written on my tyre
CanonLee
post Aug 11 2017, 02:23 PM

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QUOTE(geolee76 @ Aug 8 2017, 10:00 PM)
how do i know how much psi need to pump in...
which label to check on my tyre. is it written on my tyre
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it is not written on the tire.
it might has a label stick behind the fuel door. then you might refer to the recommended pressure for different tire size.
i believe you can check the recommended pressure inside your car manual booklet as well.

you can provide your tire size and sifus here will recommend you instead.
namasayadin
post Sep 11 2017, 02:42 PM

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hi guys. bought a new saga with 15 inch wheel just for a week,

yesterday i thought the pressure in the tire is less so went to petrol pump to fill the air. the shock is the air tire pressure was already 40psi. i have only change to 33 psi to both of front tires only but not at back since i am confuse. the maximun load on the tire is 44psi if not mistaken.

do i need to change the pressure on the back tire as well? first time owning a car here.
zeng
post Sep 11 2017, 09:56 PM

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Without knowing further details from your car and tyre size, all four tyres on 40 psi should be ok for agility and FE.
All four tyres on 33 psi should be fine too.

My wira calls for 29 psi on all four, but I pump up to 37/38 psi for agility.
namasayadin
post Sep 12 2017, 11:57 AM

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this is my tire specs is 185/55R15 and the tire is Good Year but forgot which model. i checked yesterday the max load is 51psi and not 44psi as i mention. so i went to petrol pump to check my tire pressure.

the tires is still cold so when i checked the pressure is 240kpa, not sure what the psi is haha. so i put all my tires to 240kpa.

i was confuse because the guide at the door stated 210kpa for front and 20kpa at back during cold tires. just that even i put 240kpa, the tire look like inflated like not enough pressure. is it ok for tires to look like that as long as the pressure is enough?
zeng
post Sep 13 2017, 01:01 AM

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240 kpa is ok for your car, that specifies 210 kpa for front and 220 kpa for rear.
These tyres could go up to 250 kpa if you wish, up to 160 km/hr.
BboyDora
post Oct 1 2017, 11:06 PM

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Hi All,

My tyre is written with Max pressure 350 KPA 51 PSI

May I know what is the recommended air?

My tyre brand is continental CC6

Thanks.
netmatrix
post Oct 1 2017, 11:16 PM

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I'm running 210kps front & 200kpa back. RWD corolla.
zeng
post Oct 3 2017, 01:12 PM

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QUOTE(BboyDora @ Oct 1 2017, 11:06 PM)
Hi All,

My tyre is written with Max pressure 350 KPA 51 PSI

May I know what is the recommended air?

My tyre brand is continental CC6

Thanks.
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My wira 1.5 (and Avanza 1.3) tyres are rated at maximum pressure of 51 psi too.
Proton specifies 29 psi for front and rear in Good Year 75/70R13.(Refer to driver side door pillar).
I had been applying 37-38 psi tyre pressure for umpteen years with good results.
Darren
post Oct 17 2017, 01:31 PM

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There is no so called RIGHT when it comes to air pressure. After all, air expand and compress when subject to different environment.

Just play around with the figures until you get what you want. 30PSI is just nice but you will need to pump it really often. Different tires profile and design will react differently. Like those eco tires which are usually thick and with soft tirewall, you will feel much better under braking if you over inflate them but if you overdid them, it felt like riding a horse when going over those yellow lines. Just try and feel for it yourself. Everyone has different taste.

Usually I pump 32-33PSI for the best of both world. Not too hard, not too soft.
1tanmee
post Feb 11 2018, 11:01 AM

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There is this maximum pressure allowed, indicated on the tyre wall. It makes sense not to pump air to this 'maximum pressure', right?
zeng
post Feb 12 2018, 10:18 PM

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QUOTE(1tanmee @ Feb 11 2018, 11:01 AM)
There is this maximum pressure allowed, indicated on the tyre wall. It makes sense not to pump air to this 'maximum pressure', right?
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Yes, one should not pump air to the maximum pressure indicated, as like 51 psi for some tyres.

alphaz
post Feb 13 2018, 10:20 AM

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The door sticker on my Elantra 2002 recommends 210/230 kPa. When I was using old tires anything above 240 kPa will cause road surface and tire noise more noticeable . But after change new tires now I pump 260 kPa still smooth ride.
zeng
post Feb 13 2018, 10:46 AM

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I pump all my 82H/88H tyres up to 280 kpa/ 41 psi for fuel economy and agility.
1tanmee
post Feb 14 2018, 07:27 PM

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QUOTE(zeng @ Feb 12 2018, 10:18 PM)
Yes, one should not pump air to the maximum pressure indicated,  as like 51 psi for some tyres.
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How much would the air pressure increases if driving for long hours during the hot day? It should be about 4-6psi?

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