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correct tyre pressure in Alto

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#11 01-Jun, 2010 04:27 PM
Amit
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Joined Date: 22 May 2009
Location: Pune
Posts: 1123
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I already said that I do not remember, It was in the back of my mind ...I may be wrong. This month I will be completing my first year in car world. So, I do not claim myself to be an expert. I have already taken your point which is given below.

Posted by Krishna

Amit - Highway travel is FAST. You know the tyre sidewall flexes as it passes below the vehicle and comes up behint the patch that is in contact with the ground. This flexing heats up tyres and also pushes them towards fatigue failure. If you have LESS air in the tyres, the tyres will get hotter, and fail catastrophically (Burst in normal language).

So please stop embarassing me by posting so many links on the matter.




Smile : A curve that can set a lot of things straight.
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#12 01-Jun, 2010 04:40 PM
R Srinivasan
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Joined Date: 05 Aug 2008
Location: Mumbai
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I also keep 35 psi tyre pressures in both my vehicles -- Santro and Swift Dzire Vxi. Recommended tyre pressure for Santro is 30 psi and for Dzire is 33 psi.

In rainy weather and/or when tyres get old, it may be prudent to drop the pressure slightly (say 33 psi) for optimal braking and road grip, considering that we will be doing lower speeds anyway. Also on bad roads or for city use, I would recommend sticking to manufacturer's recommendation. But being lazy, and considering the frequent highway drives, I always maintain 35 psi in my Santro under all kinds of conditions.

For Alto, noting that it is a light car with fairly thin tyres, 35 psi could be on the higher side for stock tubetype tyres-- braking and road grip could be affected, especially when tyres get older. But if tyres have been upgraded to tubeless (e.g. Michelin) then 35 psi could be fine. It is up to each driver to experiment and find the optimum according to his/her driving style and the condition of the road/vehicle.

Here is an interesting experience of mine with Swift Dzire Vxi. Got the tyre pressures set to 35 psi at a petrol bunk, and took the car for a Mumbai-Pune drive. Took a sharp right under a flyover to turn towards Pune. To my horror, the car did almost a 45-degree spin, with the rear sliding to the left (this skid is called "oversteer"). Had a tough time controlling the car but managed to straighten it out. Fortunately at 8 AM the traffic was light and there were no vehicles close to my left.

I was puzzled by this skid, for I was doing my normal speed. My instincts told me that this skid was not normal. Later on, found that the rear left tyre had lost pressure due to a puncture. Pressure was about 24 psi. The digital gauge at the petrol bunk had malfunctioned. This drop in pressure had happened in about 2 weeks.

This is an important lesson for those who would keep lower-than-recommended tyre pressures for the highway. I would say: Never, ever do that. You will not have any margins in case of puncture and could suffer a serious accident.




[ http://in.youtube.com/profile_videos?user=sradhakr1&p=r ] & [ http://arxiv.org/abs/quant-ph/0504115 ] & [ http://www.worldscinet.com/ijqi/08/0803/S021974991000640X.html ]
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#13 02-Jun, 2010 06:39 PM
Amit Singh
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Joined Date: 08 Feb 2010
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thank u guyzInnocent



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#14 02-Jun, 2010 07:55 PM
Krishna
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Joined Date: 10 Jan 2009
Location: Noida
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Posted by amit.mudgal
So please stop embarassing me by posting so many links on the matter.

Well, that was never the intention.

Posted by shaggy_amitb
thank u guyzInnocent

In normal language, the thread owner is satisfied with what has been discussed, and does not wish that anyone should post on this thread.

I am keeping the thread open, just so that if someone has anything related to this precise topic, the same thread can be used.



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#15 03-Jun, 2010 11:16 AM
Nipun Bharti
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Joined Date: 28 May 2008
Posts: 535
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I keep 33 psi in all tyres for local and 35 for highway for Alto.do remember that recommended press. of 30 by Maruti is cold condition pressure while we are actually with a hot tyre when we go to chech air pressure,so this correction factor works well.



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#16 03-Jun, 2010 11:57 AM
Amit
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Joined Date: 22 May 2009
Location: Pune
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Oh my my, and I was living with that wrong knowledge for an year that we should keep the air pressure less while on highway. I commute on higways often ...thank God!! Surprised

@ Krishna: Sir g, no grudges from my side . Anyways, there is a saying that " It's better to be a fool for 5 mins by asking a question, rather than remaining a fool forever by not asking". So I am happy that I am no longer a fool in this matter.




Smile : A curve that can set a lot of things straight.
Last Updated: 03-Jun, 2010 12:00 PM, by amit.mudgal
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#17 07-Jun, 2010 03:19 PM
Yash
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Joined Date: 06 Sep 2008
Location: New Delhi
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I also keep a pressure of 35 psi in my Accent tyres irrespective of driving mode (highway / city), weather or temperature. Would openly suggest everyone to follow the suit.



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#18 14-Jun, 2010 07:21 PM
Avinash
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Joined Date: 22 Nov 2009
Location: Bangalore
Posts: 65
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for alto, city use.. i reckon 31 air pressure is perfect... use the shell fuel stations , they have good equipments 31 is kool, gives me around 16.5km in the city with air con used during the day light



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