From: Steve & Jeanne Keith (cckw@attbi.com)
Date: Sun Jan 19 2003 - 07:14:03 PST
There are a couple of different types of 'split rims' and they have
different dangers:
The more current literally split rims like those used on older M35s and M37s
operate in a more safe way IF the tire is in good condition.
To remove the ring, the tire bead must not be in contact with the ring. The
ring can then be expanded and be removed. When assembled, the bead of the
tire keeps the ring from expanding and being removed/blowing off. If you
look at the gap in the ring where it comed together, you can get a good idea
if it is/has expanded/been installed correctly. In addition, the
mating/latching surfaces play a role in this though not as much as in the
other type. If they are damaged or badly rotted (notice I didn ot say
rusted) and weakened, then they may be a danger.
The earlier type used on some WW2 vehicles like the GMCs, Studes and
Chevrolets look to be more dangerous. With these wheels, the ring has no
split in it. It also does not go under the bead of the tire. These rings are
'streched' to get them to pop onto the wheel. Once on, they are constantly
be pushed sideways to come off. Remember, as there is no split and no going
under the bead, only the locking area keeps the ring from blowing off.
I have over 100 of this 2nd type of wheel. I do all my own tire changing and
do not use a cage. After assy, a lot of agressive tapping with a hammer on
the ring to get it seated correctly. Pump up to 10 psi while tapping and
sitting off to the side.
I then install the wheel, ring in, install hearing protection and inflate
the tire. If the ring blows, it will blow into the inner wheel or frame. The
noise might damage my hearing though. I have two right now on my primary
deuce with noticiceably bent rings. I did not think that they would hold, so
I put them on the rear outside (ring facing in). They have been on there for
a couple thousand miles now...
I do NOT use chains because I fear that any violent explosion might break
the chains and creat more shrapnel. Mount the wheel, ring in and inflate.
Steve AKA Dr Deuce
----- Original Message -----
From: "Bjorn Brandstedt" <super_deuce@hotmail.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Sunday, January 19, 2003 9:13 AM
Subject: [MV] Split Rim Wheels question
> We are all aware about the danger of a split rim flying off, maiming or
even
> killing someone during tire assembly. I have had a number of tires "done"
at
> a shop in nearby Mt Airy, NC. They all talk about the danger, but are not
> concerend about safety cages. I guess they know what they are doing.
>
> My question is, does the danger dissapear once the rim is installed and
the
> tire inflated? What I mean is, when we later deflate the tire (off road
> driving, etc) and again inflate it, do we again stand a chance of being
hit
> by flying iron or is the rim "safe" after a proper installation?
>
> Thankful for any futher info.
> Bjorn
> MVPA 19212
>
>
>
>
>
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