When you say split rim, what comes to mind for me is the old style locking ring wheel that isn't used much anymore. There were a lot of serious accidents. Maybe you can post some pictures of your wheels.
http://www.steelsoldiers.com/showthread.php?96857-Split-Rim-Safety here is link to the full tire safety video mentioned in post
TIRE SAFETY VIDEO
Seems like most people call the wheels used now on bigger MV "2 piece wheels". This thread has a good discussion and drawings of several types.
Combat-wheels-FMTV-wheels-HEMTT-wheels
Also, I'm not up to speed on details but there has been a lot of discussion about making sure the style of bead on the tire matches the wheel-MPT vs non-MPT.
Originally Posted by
gringeltaube http://www.steelsoldiers.com/showthread.php?105195-m35a3-rims-and-tires-fit-on-m135/page4
... BUT:
NEVER do it the other way around: like mounting/ running 12.5R20 or 14.5R20 (MPT)tires on the
Canadian 20x8" wheels for example, or recentered FMTV, MRAP, HEMTT, 5ton combats, etc, all of which are industrial NON-MPT wheels. Doing so IS DANGEROUS!! Absolutely a NO-NO!!...
I'm not familiar with the M813, but one other thing to consider- Is the larger tire going to rub anywhere up front on tight turns? if so, maybe you need a spacer or a wheel with different offset to move tires away from frame.
http://www.steelsoldiers.com/showth...g-out-front-5-ton-two-piece-wheels-for-1600-s
Problems with tube type tires if lowering air pressure
This site has been great for helping me move along the learning curve, and there is a lot to learn!
I've got split rims on it now! Bought it that way from the Veterans Museum in Oshkosh, WI. I have a combat rim for my spare, but the offset is WAY off to use on my truck. (an older M813a1) I had been told my rims were 14" wide...but I have yet to find any. Been looking for months now. That's why I started a new post asking for help. I've called to many vendors. No one seems to know what I'm talking about. I was hoping an expert here would at least know about them.