Tire mounting question with picture

EM Iowa

Member
These are rims for my F-20. From what I understand they are a Firestone split rim. I was wondering if there is enough room on the rim to mount the tire without having to remove the split ring. Has anybody ever done this before?
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What is the problem with removing the ring? It would be easier to put the tire on. The drop in the middle does not look deep enough to me. If you don't bend the ring it will be fine.
 
I know you're scared because its a 'split rim'.Dont be.Just be careful when you remount the ring,make sure it seated.Tap on a little to 'seat' it.It'ill be fine..If you want,wrap a chain around to catch if it blows.It wont.If the tire shop is so incompetant/inexperienced to do a split,Find a different shop,Find a shop that works on ag/industrial/construction equipment.Those boys can handle it!Steve
 
I never tried but as said it's quicker to do it the normal way. That being said, make sure you clean the ring and seat good before you put it back together. If you don't have a tire cage just put a chain on to inflate it.
 
I have never seen a rim like that with a split across it. on split rims the one outside is removed and the tire is just pulled off. these look almost dangerous. cant even see a split ring on it. just that little tab holding the "crack" together.
 
They're supposed to be the way they are. Do you think both rims happened the break the same way in the same place? I've seen many sets of them, some were at RPRU. The ring is on the right side of the rims in the second picture. Old F-20 knows about them.
 
I'm not scared because it's a "split rim", I was just curious if it could be done and if anybody has done it.
 
He got those rims from me, and I can tell you those are a factory style rim. Ive seen THREE different type rims for the rear cast centers, this is one of them.


As far as the tire question, NO you cant mount them like a conventional tire. as Phil pointed out the 'well' isn't deep enough.

best way to mount them is get a scrap piece of carpet and do it on the floor. put some pieces of scrap 4x4 under the rim to get it up off the ground. put the tire on then let gravity work with you when you put the snap ring on and get it seated
 
I have done some truck rims.The most important thing is to make sure the ring grove is clean of rust and dirt.As you air it up tap the ring several times to make sure it is seated.To be safe cage it or chain it. Just be careful and you will be fine.
 
no you will have to remove ring. I have seen pictures of that style rim, but haven't seen any of them in person. All of mine the rim is solid and the ring is split.
 
AS others have said, that rim is correct and as manufactured. Take the lock ring off. Also, take the connecting bolt out, and overlap the two ends of the rim. The tire will drop right in. Then, with a small crow bar or tire iron, spread the rim back into alignment and put the bolt in. Put the lock ring on, and put in about +/-5 PSI of pressure. Use a rubber mallet and work your way around to get the bead up against both the locking ring and the other solid rim lip.

Seating the bead on a split rim is NOT, I repeat NOT like doing a solid rim. You work the bead up onto the lock ring a little at a time, until it seats. Then, with the lock ring pointing AWAY from you, slowly bring it up to pressure, which should be around 12-15 PSI.

Have done quite a few rears that way. I have done a number of truck tires too, but they run at 100 PSI, and usually I had/have a cage made for the job. However, I have also done a few the old fashioned way, which is to point the ring away from you, and reach through to fill with air, or use a locking chuck.

In any case, you never pressure up to "snap" the bead into place on a split rim. You ease up on it, until the bead seats against the lock ring and the lock ring is seated. Then bring it up to the correct pressure.

The reason people get hurt with these is because they are lazy or impatient, and the results are the horror stories you hear.
 
I'm going to add, if you chain it, put a chain around the tire/rim assembly at two or three points. If it's only chained at one point and lets go, there is a good chance that the opposite side could swing up and hit you yet.

You could pull a loader up with the bucket a couple inches over it as well.
 

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