Possible solution to slow leak in front tyre

[blastedbugler]

Further to my previous posting about a slow leak in my front tyre.
As I have tried all the options and not been able to stop the slow leak in my front tyre, or identify how the air was getting out, I have been investigating the option of putting nitrogen in the tyres instead of compressed air.
If you do a Google search on " Nitrogen in tyres", it seems to indicate that Nitrogen is commonly used and has less chance of leaking through a porous tyre than compressed air.
I have a few tyre suppliers in my area who use Nitrogen so that is my next step.
You need to purge the air out of the tyre a few times so as to eliminate the air and especially the moisture which is a problem with compressed air.
Don

Further to responses received.
I have already carried out the following.
Remove tyre, checked for damage, cleaned bead, inspect wheel for damage, put in new metal right angle valve stem, checked again with detergent mix for leaks around bead, valve & tyre.
As it is such a slow leak I didnt hold much hope of finding the leak.
About the last option now is a porous tyre & nitrogen should help.
From the responses to my original post, slow leaks ( impossible to find ), seem to be a common problem with new & old tyres.
Don

[N8171S]

If you are using the original valve stems they leak when they get old and can break off suddenly without warning.  They can be changed without removing the wheel  or tire.  Nitrogen will still leak but maybe a bit slower.

[Daniel Meyer]

If you have a leak, you have a leak. Nitrogen won't help. (the air you get out of the regular hose is 78% nitrogen)

[R J]

Have you jacked the front end up, got a soapy mixture in a spray bottle?

Then slowly rotated the wheel on one side and spray the rim and the bead?

Then do the other side, if nothing, go to the valve stem and spray it.

Nothing yet, spray the tread area a couple of times, on the 2nd pass, rotate wheel, look for any bubbles, spray again, repeat this process till you have completely went around the tire again.

If all those tricks fail, break the bead on both sides, wire brush the rim bead area, put so snot on it, tire mounting lube, and re-inflate.   Take it up to 50 to 55 #'s, then deflate to what pressure you   normally, by the way, what pressure do you run, 40 to 45 I hope.

While ya got the bead broke, install a 90 degree steel valve stem.  I've forgotten the name of the place I got mine, let me look see if I can find it.

Can't remember it and hopefully someone on the board will chime in with the link.

I put them in MGM 13 years ago when I put chrome wheels on MGM.   NO problem so far.

[BonS]

If you have a leak, you have a leak. Nitrogen won't help. (the air you get out of the regular hose is 78% nitrogen)

And since it's only ~22% oxygen then a little math reveals something interesting:

If tire pressure loss due to oxygen loss is correct then you are primarily losing oxygen @ 100% rate and the nitrogen remains in your tire during the slow leak down. So if you lose 5 psi out of 40 and refill you now only have about 10% oxygen in your tire. Now if the oxygen theory is correct then you can't lose another 5 psi due to oxygen loss because you'd run out of oxygen after another 4 psi loss. I've never seen a slow leak stop like this.

[whitestroke]

A oz. of Green Slim stopped my slow leak.  Just go on a long ride after using.

[art]

I had the same problem sn found a bad valve an changed it only to find out the one I used was also bad an changed it again now its ok

[Evie]

I think you've gone off the deep end.   Nitrogen...really!   You've got a slow leak.  Take some extra time and find it....move the valve stem around when you soap it...you'll find it...and know this is NOT a common problem!      Find the leak!

[Gryphon Rider]

I agree with the others.  It's not a nitrogen vs. oxygen thing; you have a leak.  When my tires have no detectable leaks I don't think I've had to add air more than a couple of times a season, and then it's certainly not more than 1-3 PSI added.

[art]

I submerged my whole wheel in a childs swimming pool to find out where I had a leak.It worked great.I did clean out the bearings an regreased them after.