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is a welded rim a very bad idea?


adnanshah247

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Hello folks,

 

Somebody i know is selling me a set of blitz 18" wheels and as he was taking them off he noticed that one of the rims has a small weld. there are no vibrations in the car etc. whilst driving and the car doesnt steer itself etc. how ever the welded rim does have a lot of balancing weights on it.

 

im getting them at a very cheap price and they look very nice, very good condition, however is buying a welded rim a very bad idea?

 

they are genuine blitz light weight wheels.

 

thanks for the input

 

Adnan

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gav if you dont mind can you give me a lil explanation as to why? is the wheels shape and integrity completly lost?

 

Well, couple of things...

 

Firstly the material could be compromised from the high heat of welding, also was the welding wire of the same compound as the original rim otherwise you have mixed materials. That in itself could introduce a weak spot should something impact the rim.

 

There is the fact that it has tons of weights on it JUST to balance it out. Rotational balancing is one aspect ie, just spinning the rim round, but there is also the side to side aspect of balancing which will also be out, ie it could be buckled ever so slightly in a vertical manner.

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Well, couple of things...

 

Firstly the material could be compromised from the high heat of welding, also was the welding wire of the same compound as the original rim otherwise you have mixed materials. That in itself could introduce a weak spot should something impact the rim.

 

There is the fact that it has tons of weights on it JUST to balance it out. Rotational balancing is one aspect ie, just spinning the rim round, but there is also the side to side aspect of balancing which will also be out, ie it could be buckled ever so slightly in a vertical manner.

 

thank you so much for that, as you mentioned firstly about the heat and mixture of materials, i was thinking this, blitz do use exotic materials and who ever welded it must have used shitty materials, its clearly not a proffessional weld, looks all blooby and stuff.

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Sounds to me if it has a blobby weld, or as many call it pigeon sh*t welding, the person who done the repair was not that good at welding, depending on how blobby it it is brings the question of whether the weld penetrated enough.

 

I agree but you need to know if it was a crack thats been welded or curb damage etc before you can just say yeh its scrap because its welded, the crap weld could be removed easily and done properly but dependant on more info with pics

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A weld is always the weakest point on any welded material, I would only have a welded rim if it was steel rims and only if the repair was on the outside of the lip. Not to say you cannot weld alloy rims but IMO its takes much more skill and the appropriate welding wire.

 

Ive seen aluminium plate welded with steel wire, not good some people think welding equipment will join any type of metal together.

 

Just another thought as they are 18" rims you will probably be on low profile tyres and with the hard suspension, number of potholes about it will probably be under more stress so you would want any rims on your supe to be 100%.

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Not the best pic in the world but better than nothing, its obviously a crack thats been welded so going on the not so nice weld i guess it wasnt crack tested or x rayed to see just how far the crack actually went so i'd leave that alone.

 

The crack could extend a lot further into the wheel but be invisible to the naked eye and this is why i wouldnt buy a wheel repaired like the one above.

 

One way of stopping the crack if you find where it really ends is to drill a small say 5mm diameter hole right at the end of it before you start to weld, the welding heat usually opens up the crack further as you weld which doesnt happen if theres a hole there.

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