Correct Tyre Pressures

vnabhi · 28th May 2009, 12:07

The most complex tyre pressure is for the Ford Fiesta for its stock 175/65/14 stock tyres ---it is 30 in front and rear when laden with one or 2 passengers, and 35 in the front and 44 in the rear when fully loaded with passengers and luggage.
But I've found that sticking to the fully loaded pressure does prevent the car from bottoming out on speed breakers when fully loaded.

KSM-Vtec · 28th May 2009, 12:49

Well i remember reading on some forum that the max one should go is 90% of max pressure(tyre specific). Now this would be as per the road conditions outside India. Looking at the road conditions here i dont think we should go beyond 70% of max pressure.

So for example on my s drives the max pressure is 50psi, going beyond 35psi can be risky for sure and hence i dont not go beyond 30psi(60%).

The matter is very subjective and depends a lot upon the road conditions and speed at which the tyre is used. Better to play safe.

What is interesting to note is that the tyre pressure recommended by Indian tyre manufacturers is almost 60% of max pressure.

arbj2 · 17th January 2010, 17:47

Hi,

I wanted to know the correct tyre pressure for my Maruti 800 (1984 model).

The car has MRF cross-ply tyres.

A sticker in the car door mentions the air pressures for the front and rear tyres to be 22 and 23 psi respectively. Is this correct ??.

I searched this forum, but I was unable to find the answer, maybe I am using the wrong search parameters.

The guy who fills the air told me it was too low, and that the correct pressure was 30~32 psi.

I thought I should confirm this first from you gurus.

thanks in advance
ar

Jaggu · 17th January 2010, 17:55

If the tyre size is stock, stick to the door sill aka company recommended pressure. If you dont carry load or passengers behind even the same pressure as front is aok.

Surprise · 17th January 2010, 18:55

http://www.team-bhp.com/forum/tyre-a...ressure-7.html

http://www.team-bhp.com/forum/techni...-inch-psi.html

There are couple of similar threads exists, but one is in "technical stuff" (importance of right PSI) & the other is on "tyres and alloy wheel" (right pressure). May be we can merge all or with either of these

scorpio_fan · 30th January 2010, 14:19

Hi,
I am confused with the air pressure of Alto and Maruti Zen (old model). I use a Zen 2002 model.

According to the owner's manual for Maruti Zen, the specification is below.
Tyre Size : 145/80R12
Recommended Tyre Pressure : 1.7 kg/cm2 - 24 psi
Weight : 750 - 765

For Alto
Tyre Size : 145/80R12
Recommended Tyre Pressure : 2.1 kg/cm2 - 30 psi
Weight : 740 - 750

Can any one tell me why there is a difference in recommended air pressure where there is not big difference between these 2 and the tyre size is exactly the same?

Till now I was filling 30 psi and after the recent service the maruti service centre adviced me to use 24 psi.

fine69 · 3rd June 2010, 18:38

I have Michelin XM1+ 185/70 R14 on my swift diesel but have no clue what would be the recommended tyre pressure. I'm assuming 32 psi across all tyres but would like expert advise on this please.

5 days in a week the car is driven by me (single occupant home-office-home) and on weekends there's just one more passenger, my wife, and almost never is the rear seat occupied.

Please suggest the tyre pressure that should be maintained.

Also, in case I plan long trips should I increase/decrease any 1/2 psi, thanks.

fine69 · 4th June 2010, 18:28

Mods you may please merge this with my last post

Spoke to Jitesh (BK Tyres) and as per him Michelin 185/70 R14 on Swift Diesel should have 30psi tyre pressure. Would this be ok?

Thunderlover · 30th July 2010, 17:19

Thanks Revtech... I have a carb Zen 2000 model.. with the 145/80 R13/// and 28 PSI works well for me as well.. reduces the bump considerably... thanks again..

sgiitk · 30th July 2010, 23:16

@KSM-vtec; There are two pressures.

The recommended inflation.

The maximum rating of the tyre. Do not exceed this or to be safe 90% this. The former will be lower!

Porschefire · 22nd August 2011, 12:02

Hi Guys!I need a bit of help for maintaining the tyre pressure on my Getz Prime 1.1.
Hyundai recommends tyre pressure of 30psi all around for upto 2 people inside the car and 33psi when fully laden.Usually its me or my dad who drive the car and only on a rare ocassion that it is fully laden.I maintain 30psi whenever i go for a refuel (15-20 days period).Today on a routine check,to my shock,the pressure on both the rear tyres had dropped to 26psi!!

My question is,is it advisable to maintain a bit higher pressure than recommended so that the actual pressure is maintained?Like in my case,should i fill upto 31-32psi so that the pressure won't drop?Will the ride quality be hampered with this marginal increase in pressure??

Habanero City · 27th August 2011, 19:05

Quote:

Originally Posted by Porschefire

Hi Guys!I need a bit of help for maintaining the tyre pressure on my Getz Prime 1.1.
Hyundai recommends tyre pressure of 30psi all around for upto 2 people inside the car and 33psi when fully laden.Usually its me or my dad who drive the car and only on a rare ocassion that it is fully laden.I maintain 30psi whenever i go for a refuel (15-20 days period).Today on a routine check,to my shock,the pressure on both the rear tyres had dropped to 26psi!!

My question is,is it advisable to maintain a bit higher pressure than recommended so that the actual pressure is maintained?Like in my case,should i fill upto 31-32psi so that the pressure won't drop?Will the ride quality be hampered with this marginal increase in pressure??

With increased tire pressure the ride quality will deteriorate.
It is always better to stick to the recommended tire pressure by the Car manufacturer.
There could be some reason for the drop in tire pressure such as leaking valve, small puncture etc.,
I suppose you are using tubeless tires with possibly Nitrogen filled in it.
In this case the leak will be very slow for tire puncture and will show as loss in tire pressure.
Please get the tire checked up at the earliest.

HC

Ragul · 27th August 2011, 23:59

I cannot find the minimum recommended pressure for Yokohama Geolander A/T-S 215/75/R15 on the website.

The sticker on my vehicle says 20psi front/Rear unladen so I use that when driving since I am usually alone. But I don't want to go below the limit for the Yoko's on a regular basis.

Anyone got a clue?

Thanks
--Ragul

Ad1tya · 31st October 2011, 15:14

I drive a Cruze, using the OE tyres which are JK's 205/60 R16 (AFAIK)..

What's the tyre pressure I should be using on it?

I use 30psi for the rears and 32psi for the front.
I've tried using 32psi in all 4 (and I almost spun out on a stretch of gravelly road at Worli, due to a retarded Cabbie).. So since then, I started using 30psi for the rears.

My friend uses 28psi for all 4.

Thus, I'm sorta confused. The 32/30psi is working really well for me and I feel that I have better control over the car with this pressure. But I'd appreciate some input.

007 · 31st October 2011, 16:01

30 psi for Petrol car & 32 psi for Diesel car, in all tyres is a generic guideline based on my experience.

This will ensure good FE too.

However the Pressures are to be kept slightly higher (than above) for lower profile tyres than the one OE.

I go a step ahead & fill 35 psi (Front) & 32 psi (Rear) in my Indica tyres (250000 km old), but it merrily return me 20 kmpl (without ac) always on tankfulls.

28th May 2009, 12:07	#31
vnabhi Senior - BHPian Join Date: May 2007 Location: DC -> DC Posts: 5,998 Thanked: 2,425 Times View My Garage	The most complex tyre pressure is for the Ford Fiesta for its stock 175/65/14 stock tyres ---it is 30 in front and rear when laden with one or 2 passengers, and 35 in the front and 44 in the rear when fully loaded with passengers and luggage. But I've found that sticking to the fully loaded pressure does prevent the car from bottoming out on speed breakers when fully loaded.
	() Thanks

28th May 2009, 12:49	#32
KSM-Vtec Senior - BHPian Join Date: Jun 2008 Location: MH-02-India-Bombay-Bandra Posts: 1,561 Thanked: 447 Times View My Garage	Well i remember reading on some forum that the max one should go is 90% of max pressure(tyre specific). Now this would be as per the road conditions outside India. Looking at the road conditions here i dont think we should go beyond 70% of max pressure. So for example on my s drives the max pressure is 50psi, going beyond 35psi can be risky for sure and hence i dont not go beyond 30psi(60%). The matter is very subjective and depends a lot upon the road conditions and speed at which the tyre is used. Better to play safe. What is interesting to note is that the tyre pressure recommended by Indian tyre manufacturers is almost 60% of max pressure.
	() Thanks

17th January 2010, 17:47	#33
arbj2 Newbie Join Date: Jan 2010 Location: Meerut Posts: 21 Thanked: Once	What is correct air pressure for a Maruti 800 ? Hi, I wanted to know the correct tyre pressure for my Maruti 800 (1984 model). The car has MRF cross-ply tyres. A sticker in the car door mentions the air pressures for the front and rear tyres to be 22 and 23 psi respectively. Is this correct ??. I searched this forum, but I was unable to find the answer, maybe I am using the wrong search parameters. The guy who fills the air told me it was too low, and that the correct pressure was 30~32 psi. I thought I should confirm this first from you gurus. thanks in advance ar Last edited by Jaggu : 17th January 2010 at 17:54. Reason: Please continue in an existing thread. Thanks
	() Thanks

17th January 2010, 17:55	#34
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,380 Thanked: 17,284 Times	If the tyre size is stock, stick to the door sill aka company recommended pressure. If you dont carry load or passengers behind even the same pressure as front is aok.
	() Thanks

17th January 2010, 18:55	#35
Surprise Senior - BHPian Join Date: Feb 2005 Location: Chennai Posts: 2,529 Thanked: 462 Times	http://www.team-bhp.com/forum/tyre-a...ressure-7.html http://www.team-bhp.com/forum/techni...-inch-psi.html There are couple of similar threads exists, but one is in "technical stuff" (importance of right PSI) & the other is on "tyres and alloy wheel" (right pressure). May be we can merge all or with either of these
	() Thanks

30th January 2010, 14:19	#36
scorpio_fan BHPian Join Date: Jan 2010 Location: Bangalore Posts: 186 Thanked: 245 Times View My Garage	Hi, I am confused with the air pressure of Alto and Maruti Zen (old model). I use a Zen 2002 model. According to the owner's manual for Maruti Zen, the specification is below. Tyre Size : 145/80R12 Recommended Tyre Pressure : 1.7 kg/cm2 - 24 psi Weight : 750 - 765 For Alto Tyre Size : 145/80R12 Recommended Tyre Pressure : 2.1 kg/cm2 - 30 psi Weight : 740 - 750 Can any one tell me why there is a difference in recommended air pressure where there is not big difference between these 2 and the tyre size is exactly the same? Till now I was filling 30 psi and after the recent service the maruti service centre adviced me to use 24 psi.
	() Thanks

3rd June 2010, 18:38	#37
fine69 Senior - BHPian Join Date: Dec 2008 Location: New Delhi Posts: 1,598 Thanked: 1,468 Times	I have Michelin XM1+ 185/70 R14 on my swift diesel but have no clue what would be the recommended tyre pressure. I'm assuming 32 psi across all tyres but would like expert advise on this please. 5 days in a week the car is driven by me (single occupant home-office-home) and on weekends there's just one more passenger, my wife, and almost never is the rear seat occupied. Please suggest the tyre pressure that should be maintained. Also, in case I plan long trips should I increase/decrease any 1/2 psi, thanks.
	() Thanks

4th June 2010, 18:28	#38
fine69 Senior - BHPian Join Date: Dec 2008 Location: New Delhi Posts: 1,598 Thanked: 1,468 Times	Mods you may please merge this with my last post Spoke to Jitesh (BK Tyres) and as per him Michelin 185/70 R14 on Swift Diesel should have 30psi tyre pressure. Would this be ok?
	() Thanks

30th July 2010, 17:19	#39
Thunderlover BHPian Join Date: Dec 2009 Location: Jaipur Posts: 27 Thanked: 81 Times	Thanks Revtech... I have a carb Zen 2000 model.. with the 145/80 R13/// and 28 PSI works well for me as well.. reduces the bump considerably... thanks again..
	() Thanks

30th July 2010, 23:16	#40
sgiitk Senior - BHPian Join Date: Dec 2007 Location: Gurugram Posts: 7,971 Thanked: 4,808 Times	@KSM-vtec; There are two pressures. The recommended inflation. The maximum rating of the tyre. Do not exceed this or to be safe 90% this. The former will be lower!
	() Thanks

22nd August 2011, 12:02	#41
Porschefire BHPian Join Date: Jul 2011 Location: Bangalore Posts: 767 Thanked: 2,330 Times View My Garage	Re: Correct Tyre Pressures Hi Guys!I need a bit of help for maintaining the tyre pressure on my Getz Prime 1.1. Hyundai recommends tyre pressure of 30psi all around for upto 2 people inside the car and 33psi when fully laden.Usually its me or my dad who drive the car and only on a rare ocassion that it is fully laden.I maintain 30psi whenever i go for a refuel (15-20 days period).Today on a routine check,to my shock,the pressure on both the rear tyres had dropped to 26psi!! My question is,is it advisable to maintain a bit higher pressure than recommended so that the actual pressure is maintained?Like in my case,should i fill upto 31-32psi so that the pressure won't drop?Will the ride quality be hampered with this marginal increase in pressure??
	() Thanks

27th August 2011, 23:59	#43
Ragul BANNED Join Date: Sep 2010 Location: Bangalore Posts: 1,261 Thanked: 963 Times	Re: Correct Tyre Pressures I cannot find the minimum recommended pressure for Yokohama Geolander A/T-S 215/75/R15 on the website. The sticker on my vehicle says 20psi front/Rear unladen so I use that when driving since I am usually alone. But I don't want to go below the limit for the Yoko's on a regular basis. Anyone got a clue? Thanks --Ragul
	() Thanks

31st October 2011, 15:14	#44
Ad1tya BHPian Join Date: Oct 2006 Location: Mumbai Posts: 99 Thanked: 103 Times View My Garage	Re: Correct Tyre Pressures - Cruze I drive a Cruze, using the OE tyres which are JK's 205/60 R16 (AFAIK).. What's the tyre pressure I should be using on it? I use 30psi for the rears and 32psi for the front. I've tried using 32psi in all 4 (and I almost spun out on a stretch of gravelly road at Worli, due to a retarded Cabbie).. So since then, I started using 30psi for the rears. My friend uses 28psi for all 4. Thus, I'm sorta confused. The 32/30psi is working really well for me and I feel that I have better control over the car with this pressure. But I'd appreciate some input.
	() Thanks

31st October 2011, 16:01	#45
007 BHPian Join Date: Apr 2009 Location: Nasik Posts: 104 Thanked: 218 Times	Re: Correct Tyre Pressures 30 psi for Petrol car & 32 psi for Diesel car, in all tyres is a generic guideline based on my experience. This will ensure good FE too. However the Pressures are to be kept slightly higher (than above) for lower profile tyres than the one OE. I go a step ahead & fill 35 psi (Front) & 32 psi (Rear) in my Indica tyres (250000 km old), but it merrily return me 20 kmpl (without ac) always on tankfulls.
	() Thanks