Tyre Deflate + Pressure

[elwin81]

The front offside tyre (155 70R13) of my car deflate slowly day by day and I need to pump it up every 2 week. Given this rate, I am not sure if there is a puncture on the tyre. Anyone know what happen? I need to pump it at 40 psi which is quite high compare to other tyre. However, all four tyres on my car is of different make and thread which I know is not good.

[maviscoull]

possibly it is a slow puncture !

[Albino33]

I had the same problem until i had my tyres filled with nitrogen, �1.25 a tyre. My tyres are exactly the same pressure they were 6 months ago. Demon Tweeks does this but if you dont live anywhere near wrexham thats no-use to you. Other garages must offer this service

[Toureman]

Seems a waste of money going the nitrogen route.

See here..............

http://www.bridgestone.com.au/tyres/products/c ar/care/nitrogen.asp

[woodchopper]

Could just be a leaky valve - witht the dust cap on the valve removed put some spit on the valve and if it blows bubbles it is the valve that is leaking - or has been said could be a slow puncture.
Take it to Kwik fit or such like and tell them the problem - get it checked for a slow puncture and get them to fit a new valve ( they're very cheap ).
As for the 4 dfferent makes of tyre on each wheel - take it easy until you can get the chance to get them changed.

I had a puncture on my front axle and put the spare on which was a michelin, the other tyre was a goodyear - was very scary when i turned the first corner and nearly ended up in the hedge.

[Siamsal]

I knwe someone who had a slow leak, obviously he suspected the tyre or the valve. After a lot of faffing and investigation, it turned out to be on the wheel itself (IE the metal bit).

If you can, the best thing is to pump it right up and get it in a big tub of water and see where the leak is.

[sddsddean]

Have you got alloy rims as these are much more prone to 'leaking' than steel rims. Can't remember why, but thats what my mate who works as a tyre fitter said, so you should check your tyre pressures much more frequently if you have got alloys.

[elwin81]

Thanks for all the answers gents.

woodchopper, I will try to check if I got a leak valve before taking my car to the garage.

Siamsal, I will try to check if I got the metal bit on the wheel.

sddsddean, I got steel wheels on my car.

[Siamsal]

I think you misunderstood - I mean it was the steel/alloy rim itself that was leaking. A hole in a weld, or something.