a REAL flat spot

[marshall_mosty]

I think I really flat-spotted these tires...

[marshall_mosty]

No, Really.....



I just got my nitrogen setup working and was wondering if the schrader valve on a typical valve stem was good for vacuum too.

I "rented" a vacuum pump from AutoZone and used an old R12 refill hose coupled to an air tank fitting (bicycle pump type) to connect to the rim.

The pump 1/3HP was able to pull 11 inHg after about a minute of pumping. The valve held and I was the proud owner of a pentagon shaped Toyo RA1.

I guess it's now ready for the nitrogen? Since I pulled vacuum, I don't believe I need to do the fill/purge/fill/purge/fill.... routine, right?

[y5e06]

if looking for your own cheapo pump for future use you might try
http://www.harborfreight.com/cpi/cta...temnumber=3952
or
http://www.harborfreight.com/cpi/cta...emnumber=92475
powered by your shop compressor.

[jeffburch]

I've done the nitrogen thing from the get-go.
I just run them to 20psi and purge it, then refill.
I hope the steel in those tires don't remember what you put them through.
Also, bottled nitrogen isn't completely dry.
Fixing that might be more important.

jb

[marshall_mosty]

How do you dry compressed nitrogen? I thought the whole purpose of getting nitrogen was to have 100% dry gas. Now, if the bottle was outside in the rain, or submerged underwater prior to filling, I agree it could have a little retained moisture.

[jeffburch]

Sorry Marshall.
Proprietary machine I prototyped and presently seeking a patent on.
The 1st one cost me about $1100 in parts alone.
Maybe in the very near future I can share.

jb

[marshall_mosty]

Sorry Marshall.
Proprietary machine I prototyped and presently seeking a patent on.
The 1st one cost me about $1100 in parts alone.
Maybe in the very near future I can share.

jb

I guess Argent "Labs" is doing more than radios? 8) Skunkworks type stuff I bet...