Necessary to cut off runflats?

[JeepHD]

Is it really necessary to cut the runflats off of the hummer beadlocks to run 38x12.50x16.5s? I am just being lazy and it looks like it will be a pain to cut them off.

I have heard of them rubbing and tearing up the inside of tire at low PSI.

Thanks
Josh

[94Dodge Truggy]

Less weight if cut off and they can get in the way of tire flex. I am not sure if they will work with both a 6 or an 8 ply tire though. They are magnesium so don't do anything that will make them burn!

[JeepHD]

Less weight if cut off and they can get in the way of tire flex. I am not sure if they will work with both a 6 or an 8 ply tire though. They are magnesium so don't do anything that will make them burn!

I mounted one of the TSLs on a rim last night just to check it out. Seemed to mount up nicely. I just don't really feel like cutting the runflat portion off, but I probably should. Also I don't have a band saw so I will have to do it with a sawzall and it doesn't look like it will be very easy.

Thanks

[carwash]

weight... ha, thats funny truggy... the things weigh next to nothing...

but, yes i would cut them off running anything less that a 40" tire. they are quite brittle and crack if hit just right. when the crack, they create sharp edges that will cut a tire.

when i ran my 39.5" boggers, i kept about 5 psi in them and every once in a while on a hard hit, i would feel it hit. Don't think i ever cracked one, but never had them apart to check either, so who knows.

I am cutting my current ones, and i'm gonna be running 44's. Bette safe than sorry i guess. They will cut fairly easy with a sawzall blade. Just get you some super long Milwaukee "torch blades" and it will roll thru it pretty easy. you will have to use a grinder as well to get them down close.

here is a shot of some shaved runflats for inspiration...

http://www.complete4x4.com/ImageFolio4_files/gallery/X_Misc._Shop_Pics/Misc._Crap/magCut.jpg

[94Dodge Truggy]

I am a fanatic on weight savings! :D But what about the 6 or 8 ply tire. Will the hummer runflat insert accommodate either?

[JeepHD]

I was pretty sure I needed to cut them, just didn't want to hassle with it. Guess I will get some long sawzall blades and go at it. My TSLs are 6 ply and the one I mounted went on fine.

[94Dodge Truggy]

But does it really hold the tire on the rim? I ran a flat once and had a tire damn near peeled off the rim over various obstacles and it never came off. I wonder with different tire thicknesses if the clamping is more or less.

[JeepHD]

But does it really hold the tire on the rim? I ran a flat once and had a tire damn near peeled off the rim over various obstacles and it never came off. I wonder with different tire thicknesses if the clamping is more or less.

I will check the bead thickness differences between the TSLs and the Military OZs to see how much difference there is.

It looked and felt like it was clamping on the tire good.

Question. I could probably sell my 8 bolts and pick up some 12 bolts (located some locally) with the rubber runflats for an extra $150. I wouldn't have to cut the runflat and I would get the thicker outer ring on the 12 bolt. I would cost about $100 for the rock rings to strengthen up the outer ring of the 8 bolts. Thoughts?

[jfiscus]

This guy just cut his runflats, maybe you can get ideas here:
http://www.mv4w.com/modules.php?name=Forums&file=viewtopic&t=202

[BiggDaddy]

I'm sure someone will have a campfire in the next few months, let's see how well these things burn! Do you remember playing with magnesium ribbon in Chet's class? That crap burns BRIGHT!!!

BiggDaddy

[JeepHD]

I'm sure someone will have a campfire in the next few months, let's see how well these things burn! Do you remember playing with magnesium ribbon in Chet's class? That crap burns BRIGHT!!!

BiggDaddy

Your's so helpful. I have read that they are a magnesium alloy, and are not as flammable as pure mag.

Maybe you should spend more time getting that grey goose flying again instead of playing on the internet, so that you can "try" to follow me on the trails this spring! :D

[JeepHD]

This guy just cut his runflats, maybe you can get ideas here:
http://www.mv4w.com/modules.php?name=Forums&file=viewtopic&t=202

Thanks, I am going to give it a try with the sawzall tonight. Unless I decide to pick up some 12 bolts on the way home.

Later

[94Dodge Truggy]

I need some hummer rims. I will machine off the runflats for you for a good deal on some rims!

[JeepHD]

I need some hummer rims. I will machine off the runflats for you for a good deal on some rims!

I only have one set right now. Thinking about going with some 12 bolts I found close to get the benefit of the thicker rim and the rubber runflat. I will make the decision today and let you know.

So what is the new build going to be? Going to us the truggy and just make some changes? Have you guys put together any kind of schedule of trail rides for 08'

[94Dodge Truggy]

Our 08 schedule will be decided tonight at the officers meeting. The rubber runflats are better? Are they lighter? If you know where I can get some rims let me know.

[JeepHD]

Our 08 schedule will be decided tonight at the officers meeting. The rubber runflats are better? Are they lighter? If you know where I can get some rims let me know.

I am sure they would be heavier? Truggy on a diet? On the rubber, it just won't damage the tire when running low PSI or when tire is pinched against it? Also the outer rim of the rim is supposed to be stronger than that of the 8-bolts.

[94Dodge Truggy]

The 12 bolt rims are made for military use of a higher psi. rated tire and where a heavier load carrying capacity is needed. (I have been told) The less mass you are rotating the better. The more you can position weight where you need it the better.

[KargoMaster]

The 12 bolts (I have read) were for the increased tire pressure that goes with radial tires. The 8 bolts were for older/smaller bias ply and then when they wanted to go to radials the stronger design was created.

This is of course here-say (sp?), as I really have no idea.

I have 12's with the rubber ring (NOT the rubber run flat... there was that option too, I have transported one for a buddy... I wouldn't want to try to jamb one of those bad boys into any tire) and I haven't had any issues, but at the pressures that we run, I can't see any downside to the 8's once you've cut the magnesium (alloy?) runflat off...

And yes, the bits that you cut off and the dust that you make, all make the campfire a little more exciting... TRUST ME. (you can easily turn the dead of night into daylight)

[JeepHD]

The 12 bolts (I have read) were for the increased tire pressure that goes with radial tires. The 8 bolts were for older/smaller bias ply and then when they wanted to go to radials the stronger design was created.

This is of course here-say (sp?), as I really have no idea.

I have 12's with the rubber ring (NOT the rubber run flat... there was that option too, I have transported one for a buddy... I wouldn't want to try to jamb one of those bad boys into any tire) and I haven't had any issues, but at the pressures that we run, I can't see any downside to the 8's once you've cut the magnesium (alloy?) runflat off...

And yes, the bits that you cut off and the dust that you make, all make the campfire a little more exciting... TRUST ME. (you can easily turn the dead of night into daylight)

Thanks, I think I am going to stick with the 8 bolts. Truggy, I will PM you info on the other h1 rims

[crazi429]

This guy just cut his runflats, maybe you can get ideas here:
http://www.mv4w.com/modules.php?name=Forums&file=viewtopic&t=202

These are my wheels I tried the sawzal route and found it to be a real pain. I came up with the whole saw trick and everything was much quicker and easier. I was doing it all by my self and it was a real pain to hold the run flats while cutting them. I did all my cutting outside the shop to reduce risk of fire in the future from all the shaving.

http://img86.imageshack.us/img86/7/h1wheels005oy7.jpg
http://img144.imageshack.us/img144/403/h1wheels008ow6.jpg

[JeepHD]

These are my wheels I tried the sawzal route and found it to be a real pain. I came up with the whole saw trick and everything was much quicker and easier. I was doing it all by my self and it was a real pain to hold the run flats while cutting them. I did all my cutting outside the shop to reduce risk of fire in the future from all the shaving.



The hole saw trick worked awesome. Got some of the torch blades and cut away. Tonight, I got four wheels done except for some grinding.

Thanks for all the help. Worked out great

[JeepHD]

Weights for your information:

35 lbs - H1 rim only(no beadlock or runflat)
47 lbs - H1 rim with complete runflat
41 lbs - H1 rim with beadlock (runflat cut off)
12 lbs - Runflat
6 lbs - Beadlock only (runflat portion cut off)

These are in no way exact numbers but close. I put them on a household scale that a person would weigh themselves on.

[94Dodge Truggy]

Yeah my 42" swamper tsl's and h1 rims were 148lbs!

The new setup will be almost 200lbs!

[JeepHD]

Yeah my 42" swamper tsl's and h1 rims were 148lbs!

The new setup will be almost 200lbs!

What else did you do to cut that much weight? Mine should be around 114 lbs.

Someday I would'nt mind upgrading to aluminum rims with stauns, but this is a cheap option for now.

[itbrokeagain]

Someday I would'nt mind upgrading to aluminum rims with stauns, but this is a cheap option for now.

I have been in situations where I have bent my steel rims very very badly and we were able to hammer them back into place. Aluminum rims would have cracked and I would have been in trouble. Just thought I would put the idea into your head.

[JeepHD]

Progression of cutting Runflats using Holesaw and sawsall method

551

552

Finished Product

553

554

[carwash]

looking good!

[crazi429]

Yep when I figured out to use the hole saw it to cut them down it took less time to do the last 3 runflats then the first one did by its self.