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Author Topic: Very slow leak from tyre  (Read 1542 times)

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redelitev6

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Very slow leak from tyre
« on: 23 January 2009, 17:54:33 »
I have a very slow leak from the front tyre of the miggy, is their a magic spray i can put in the tyre to seal it from the inside ,or do i have to get it done in a garage?
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Entwood

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Re: Very slow leak from tyre
« Reply #1 on: 23 January 2009, 18:06:22 »
IMHO it is best to take it to a tyre place and have it fixed... it could be one of numerous faults .. from a leaking valve to a corroded bead to a damaged sidewall...... (front wheels are "kerbed" far more than rears) ....

Whatever it is ... it is at risk of failing on you .. and a front wheel blow out at any speed is not nice .... above 50 mph it is likely to cause a serious accident.

:(
« Last Edit: 23 January 2009, 18:07:11 by entwood »
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feeutfo

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Re: Very slow leak from tyre
« Reply #2 on: 23 January 2009, 18:29:22 »
also quite common to have a screw,  nail, or bit of flint stuck in it, which if left can eventualy fly out and instantly go flat, probably at the worst possible moment.
Have it checked and hopefully repaired with a plug. But bet prepaired to have to buy a new tire if the damage is in or near the sidewall, it can not be plugged anywhere except in the flat of the tread with a strait through hole.

( With this in mind it makes sense to have it repaired somewhere that has a suitable tire on the shelf or you may have to drive around on the spare and go back again for the new tire to be fitted when it comes in. Depends on the damage)
Good luck.
 
Ps most puncturers occur during the last 40 to 50% of tire life, so odds are you need a new one anyway. Unless your a skint biker, as i was once, and 3 new tires in a row where holed with screws in them.... Sods rather law.
« Last Edit: 23 January 2009, 18:35:07 by chrisgixer »
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Markjay

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Re: Very slow leak from tyre
« Reply #3 on: 23 January 2009, 20:05:02 »
Had a slow puncture, the sealant spray did bugger all, the tyreman said (while cleaning the mess inside the tyre) that I was lucky becuase usually the sealant spay destroys the tyre, though I am not sure why that is... or maybe they say this because they don't like cleaning-up the stuff.

If the leak is because of a nail and not from the wheel rim, be sure NOT to remove the nail until you get to the tyre fitter... a lady I know did just that and had to call-out the AA to swap the wheel.
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stuyg

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Re: Very slow leak from tyre
« Reply #4 on: 23 January 2009, 20:15:57 »
porous alloy?
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BigAl

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Re: Very slow leak from tyre
« Reply #5 on: 23 January 2009, 21:25:46 »
Quote
porous alloy?
My dad had this on his subaru forester - ended up getting new wheels and tyres :(
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feeutfo

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Re: Very slow leak from tyre
« Reply #6 on: 24 January 2009, 03:04:37 »
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porous alloy?
Possible, some exotic aftermarket bike wheels had this problem, but had magnesium mixed with the alloy, or some such rare metal. As i remember, they painted, plastic coated inside the wheel rim in the end.

Tire places often have a big bucket/barrel of water to pin point the leak from the bubbles.

 Mate of mine owns a bike tire fitting business, he had some fancy gas to fill tires with instead of air, theory being, ALL tires leak. Rubber(not that there is much rubber in tires these days) is not air tight. If left long enough ALL tires will go flat. The gas(hydrogen/helium? Began with H anyway ) is thicker than air, so cant leak out. But it didnt take off so he dropped it... Haha, see what i did there? :-)

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markey mark

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Re: Very slow leak from tyre
« Reply #7 on: 24 January 2009, 07:48:18 »
nitrgeon is what they fill high performance tyres with chris doesnt expand like air  :y
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Andy B

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Re: Very slow leak from tyre
« Reply #8 on: 24 January 2009, 09:03:04 »
Quote
nitrgeon is what they fill high performance tyres with chris doesnt expand like air  :y

Costco fill all tyres with it and then fit a 'orrible green cap so  you know ...... unless you tell 'em! :y
« Last Edit: 24 January 2009, 09:03:40 by Andy_B »
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TheBoy

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Re: Very slow leak from tyre
« Reply #9 on: 24 January 2009, 10:30:04 »
WIM also use Nitrogen.  Seems to maintain its pressure better/evenly - tractor was Nitrogen filled in May, I check pressure every fornight or so, still the 30psi they were filled with
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TheBoy

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Re: Very slow leak from tyre
« Reply #10 on: 24 January 2009, 10:30:44 »
Tyre Weld etc is a 'get you home' product, not permenent remedy.
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redelitev6

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Re: Very slow leak from tyre
« Reply #11 on: 24 January 2009, 18:46:53 »
Got this sorted this morning,tyre hadn't sealed onto the wheel %100 and was passing a tiny ammount of air on the inside lip of the wheel ,cost me £5.00 to get fixed ,thanks for all the advice everyone.
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feeutfo

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Re: Very slow leak from tyre
« Reply #12 on: 24 January 2009, 20:47:11 »
ah happy ending,  :y  didnt think of that one...
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Entwood

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Re: Very slow leak from tyre
« Reply #13 on: 24 January 2009, 20:49:26 »
Nitrogen molecules are much larger than oxygen/water/carbon dioxide molecules .. the other main constituents of "air" .. so tend not to leak as readily through any porous portion of the wheel/tyre. Nitrogen is also an "inert" gas so does not react with any of the parts. Water vapour (H20) changes dramatically as it heats and cools, and also causes corrosion of the metals in the wheels (even alloys corrode slowly).

Aircraft tyres have been filled with nitrogen for many years mainly due to the extreme temperature changes they are subject to (-45 to +15 celcius in less than an hour is common)
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