Just sharing. During pre-trip inspection my son and I found this cracked rim on my truck. It was a surprise and was even more surprised to see the weight rating on the back of the rim. This is off a 2007 Chevrolet 2500hd classic. Camper is a Lance 845.I had no known impacts that would cause it. Of course something did cause it. What really surprised me was the weight rating on a factory 3/4 ton wheel. At 2200 lbs each, the wheels are not rated to even handle the rear axle rating. (edited to add that perhaps the extra wheel I purchased was a knockoff that was sold as a factory original)I'll be getting new wheels, but thought I would share. Perhaps this thread helps someone else to see a potential risk or avoid a potential issue.I feel blessed we found it at home and there was no catastrophic event.

I’m glad you found the crack.If you aren’t the original owner, that could be your answer. They could have switch rims because they like they way they looked, or because the 1500 rims were in great shape. I’m guessing they are probably 1500 rims since that weight would be about right for a 1500.Also, are you sure the tires are rated for more?

jimh425 wrote:I’m glad you found the crack.If you aren’t the original owner, that could be your answer. They could have switch rims because they like they way they looked, or because the 1500 rims were in great shape. I’m guessing they are probably 1500 rims since that weight would be about right for a 1500.Also, are you sure the tires are rated for more?I am the second owner. Being an 8 lug rim, I never considered it being a 1500 rim. I know at one point, they made a 1500HD so I guess it is possible. I also bought a single rim that should've been the same as the others. I'm not sure which one cracked. The extra I bought or the original 4. I'll need to take a look at the other rims to see if their ratings are different.And yes, I am sure about the tires. They are BFG AT TA 10 Ply E rated tires. If memory serves, 3750lbs per tire though I'd have to double check to be certain.We certainly were blessed to find this prior to failure at speed or away from home.

On my 03 2500hd there is no weight rating stamped in the wheels . I have not seen a GM wheel yet that showed a weight rating , only a part number . I wonder if that is a knockoff or OEM .

Didn't we have a recent thread where the OP bought some spiffy looking wheels and thought they were OK because they had a Chevy Logo? Maybe that OP should do some more research. Nay, why bother.

Cracked rim on 2007 2500hd classic | Good Sam Community

Grit_dog
Navigator
Aug 23, 2021
jimh425 wrote:
mkirsch wrote:
Naw I'm talking about all the "advice" given in this forum to put LT E-rated truck tires on half ton rims and pumping them up to 80PSI on a rim rated for 44PSI.

I guess I missed “all” of those posts.

You n me both, lol!
But what's really funny is (I quoted mkirsch's sig line) "Putting 10-ply tires on half ton trucks since aught-four."

Ole boy don't really know whether he's afoot or horseback....
jimh406
Explorer III
Aug 23, 2021
mkirsch wrote:
Naw I'm talking about all the "advice" given in this forum to put LT E-rated truck tires on half ton rims and pumping them up to 80PSI on a rim rated for 44PSI.

I guess I missed “all” of those posts.
Grit_dog
Navigator
Aug 23, 2021
@silverbullet, yes thank you for following up and the confirmation that it was a cheap re-pop wheel , not OE.
ticki2
Explorer
Aug 23, 2021
Thanks for getting back with the results . Good luck in the future .
Grit_dog
Navigator
Aug 23, 2021
mkirsch wrote:
jimh425 wrote:
mkirsch wrote:
I thought rim ratings didn't matter, rims never break...

Naw, you seem to be confusing adding 200 lbs past a wheel rating with 1500 lbs.

Naw I'm talking about all the "advice" given in this forum to put LT E-rated truck tires on half ton rims and pumping them up to 80PSI on a rim rated for 44PSI.

There's no point to putting an LT tire on if you are not going to air it up. At "half ton" pressures (i.e. 44PSI and under) the tire has no more load carrying capacity than the stock P-metric tires.

Like the rest of the last couple pages of nonsense, I'd be super interested to see evidence of such a low pressure rating on "1/2 ton truck" rims. Same goes for light trailer wheels, 14 and 15 inchers.
silverbullet555
Explorer
Aug 23, 2021
Just to wrap this thread up.

I checked another wheel on the truck and it has the stampings on the front and the GM logo stamped on the wheel. I surmise that the wheel I was sold as an original was obviously not an original or GM OEM wheel. It was sold under false pretense and I didn't inspect it closely enough when purchased. Nothing I can do about it now.

We got INSANELY lucky that we didn't have a catastrophic failure at speed, either front or back. In this case this was on the back.

I share all this with the hope that people pay attention, don't make the same mistake I did and keep an eye on their trucks for signs of issues.

The upside is that I no longer feel the need to replace all my wheels.
mkirsch
Nomad II
Aug 23, 2021
jimh425 wrote:
mkirsch wrote:
I thought rim ratings didn't matter, rims never break...

Naw, you seem to be confusing adding 200 lbs past a wheel rating with 1500 lbs.

Naw I'm talking about all the "advice" given in this forum to put LT E-rated truck tires on half ton rims and pumping them up to 80PSI on a rim rated for 44PSI.

There's no point to putting an LT tire on if you are not going to air it up. At "half ton" pressures (i.e. 44PSI and under) the tire has no more load carrying capacity than the stock P-metric tires.
3_tons
Explorer III
Aug 22, 2021
jimh425 wrote:
valhalla360 wrote:
Steel by definition is an alloy. Pure iron is not steel.

Aluminum also is always an alloy.

While there is some variability in how ductile or malleable they are, as a rule, they follow a pattern, so a crack doesn't imply an alloy or production method. Most likely it was how the force was applied.

Aluminum is an element.

If you are talking a skeg made by only a few boat manufacturers, it problably is a very specific alloy. If you are talking about other types of Aluminum alloy treated or annealed to different hardnesses, the breakage can look a lot different. Sometimes a break, but depending on how soft, how it’s made, cast or forged, and the breakage can vary alot.

Look at this guys article that is a decent writeup on Aluminum alloys, so you don’t have to take my word for it. Not saying it covers everything, but he does explain the differences in Aluminum alloys, and some of the differences. They don’t all break/bend the same.

https://www.shapesbyhydro.com/en/material-properties/here-are-the-best-aluminium-alloys-for-bending/

I’m not aware of anyone who has the unique ability to specify a certain alloy for his wheels, AFAIK, the choice amounts to either cast or forged, and sometimes even this can be difficult to determine…

3 tons
Kayteg1
Explorer II
Aug 21, 2021
Pure aluminium if extremely soft material. Used on old-fashioned tee kettles, who would dent by dropping table spoon on them.
Last year I bought patio boat with damaged ponton and after replacing it, used old pontoon as cover for my pool slide.
Cut it along and peeled open, where the bottom had 3 ft long dent on it.
I walk my 220 lb over the dent, jump on it and even it flexed slightly - it would not bend back. The thing is build with aircraft-quality aluminium alloy.
Some military grade aluminium alloys can be stronger than steel.
jimh406
Explorer III
Aug 21, 2021
valhalla360 wrote:
Steel by definition is an alloy. Pure iron is not steel.

Aluminum also is always an alloy.

While there is some variability in how ductile or malleable they are, as a rule, they follow a pattern, so a crack doesn't imply an alloy or production method. Most likely it was how the force was applied.

Aluminum is an element.

If you are talking a skeg made by only a few boat manufacturers, it problably is a very specific alloy. If you are talking about other types of Aluminum alloy treated or annealed to different hardnesses, the breakage can look a lot different. Sometimes a break, but depending on how soft, how it’s made, cast or forged, and the breakage can vary alot.

Look at this guys article that is a decent writeup on Aluminum alloys, so you don’t have to take my word for it. Not saying it covers everything, but he does explain the differences in Aluminum alloys, and some of the differences. They don’t all break/bend the same.

https://www.shapesbyhydro.com/en/material-properties/here-are-the-best-aluminium-alloys-for-bending/

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Cracked rim on 2007 2500hd classic

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