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Old 30th October 2006, 11:33   #1
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Hi

My dealer suggested me 28/28 PSI in city and 30/30 PSI for highways. But I suspect its causing more shoulder wear. Can any one throw some light on the correct pressure for Petra.

I suspect 28/28 PSI is underinflation. I use Bridgestone stock tires 175/65R14 with Alloys. Bridgestone site suggests 29/29 unladen and 32/26 laden, ofcourse it says refer to user manuals.
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Old 30th October 2006, 12:33   #2
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Quote:
Originally Posted by sreenivass
Hi

My dealer suggested me 28/28 PSI in city and 30/30 PSI for highways. But I suspect its causing more shoulder wear. Can any one throw some light on the correct pressure for Petra.

I suspect 28/28 PSI is underinflation. I use Bridgestone stock tires 175/65R14 with Alloys. Bridgestone site suggests 29/29 unladen and 32/26 laden, ofcourse it says refer to user manuals.
Apologies for typo, bridgestone laden recommedation is 32/36 NOT 32/26.
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Old 31st October 2006, 22:46   #3
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my siena runs the same size tires as yours and the tyre dealer asked me to keep tire presure at 30 for city use and 32 for highway use.
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Old 31st October 2006, 23:24   #4
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Default thats what I may try

I am trying 30/30 in city when I drive alone. May be I'll try 32/32 laden and/or highway.

According some articles I saw one should try 10% less than max psi. I see max psi for these tyres as 44 psi. Trying 40 psi may be too much because I feel the ride is harsher even with 30 psi when compared with 28 psi.
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Old 25th November 2006, 13:22   #5
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Default 30/32 PSI seems higher

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Originally Posted by hellspawn View Post
my siena runs the same size tires as yours and the tyre dealer asked me to keep tire presure at 30 for city use and 32 for highway use.
My workshop guy tells me it is 28 PSI for city ans 26 PSI for highway. I am confused, there was one thread where most of the guys said highway PSI has to be higher than city.

The engineer (workshop guy) warned me 30/32 could damage lower arms of the suspension system or whatever.

So watch out guys, does not matter petra or some other car the funda seems unclear.
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Old 28th November 2006, 00:03   #6
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checked with vivek automobiles,delhi.the mechanic told me its 30 for city and 32 for highways.
maybe khaadu can confirm???
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Old 28th November 2006, 11:33   #7
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I just picked up my new Petra and have driven just 500 km. Anuroop asked me to maintain 28 all round for any kind of travel, city or highway. I guess these service centres just give their personal opinions and not something Fiat tells them.
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Old 28th November 2006, 13:22   #8
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For my Petra, Sundaram Auto. had advised to put 29 always, But I am maintaining it at 30 with my Potenza G3 195/65/R14(Tyres really doesn't matter I suppose).

Last edited by sivadas : 28th November 2006 at 13:24.
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Old 28th November 2006, 13:37   #9
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Its so confusing, May be I'll mail Fiat guys themselves and find out what they suggest.
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Old 28th November 2006, 16:45   #10
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Manual says 29 psi. Doesn't hurt if it is 30. No big diff in ride and handling.

Same should also be OK for highways, if there is no need to do high speed driving. If you plan to drive very fast, may be can raise a 2 psi more.
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Old 29th November 2006, 12:15   #11
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Default Here is what Fiat India says

1.9 and 2.2 translate to 27 psi and 32 psi respectively.

[FONT=Verdana][SIZE=2]Dear Sir,[/SIZE][/FONT]
[FONT=Verdana][SIZE=2][/SIZE][/FONT]
[FONT=Verdana][SIZE=2]Thank you for our communication we request you to please refer OWNERS HAND BOOK page no 142, for your reference following are the recommendations:[/SIZE][/FONT]
[FONT=Verdana][SIZE=2][/SIZE][/FONT]
[FONT=Verdana][SIZE=2]1) 1.9/1.9 bar for F & R tyre -medium loading[/SIZE][/FONT]
[FONT=Verdana][SIZE=2][/SIZE][/FONT]
[FONT=Verdana][SIZE=2]2 ) 2.2/2.2 bar for F&R tyre-fully loaded[/SIZE][/FONT]
[FONT=Verdana][SIZE=2] [/SIZE][/FONT]
[FONT=Verdana][SIZE=2]We cannot comment on the over size tyres[/SIZE][/FONT]
[FONT=Verdana][SIZE=2][/SIZE][/FONT]
[FONT=Verdana][SIZE=2]Thanking you & assuring you of our best services at all times.[/SIZE][/FONT]
[FONT=Verdana][SIZE=2][/SIZE][/FONT]
[FONT=Verdana][SIZE=2]With best regards ,safe & happy motoring

[/SIZE][/FONT]
[FONT=Verdana][SIZE=2]Mangesh Kodalkar[/SIZE][/FONT]
[FONT=Verdana][SIZE=2]After sales[/SIZE][/FONT]
[FONT=Verdana][SIZE=2]Fiat India Pvt.Ltd[/SIZE][/FONT]
[FONT=Verdana][SIZE=2]Mumbai 400070[/SIZE][/FONT]
[FONT=Verdana][SIZE=2]+91 22 25097427[/SIZE][/FONT]

Last edited by sreenivass : 29th November 2006 at 12:18. Reason: funny tags cropping up
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Old 29th November 2006, 12:20   #12
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apologies for some funny tags, the crux is

1.9 (27 psi) unloaded and 2.2 (32 psi) loaded.
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Old 29th November 2006, 13:58   #13
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so i guess 30 should be okay cos the mean of the two(27+32/2) works out to 30
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Old 29th November 2006, 14:38   #14
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Quote:
Originally Posted by hellspawn View Post
so i guess 30 should be okay cos the mean of the two(27+32/2) works out to 30
That is a good idea. I shall try that tomorrow morning when I plan an air check up.
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Old 29th November 2006, 21:03   #15
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Default its medium load NOT unloaded

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Originally Posted by hellspawn View Post
so i guess 30 should be okay cos the mean of the two(27+32/2) works out to 30
please note 1.9 (or) 27 PSI is for medium load or light load, dont forget to refer to page 142 of owners handbook.
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