Damn & blast

[Smartbear]

I would expect it to start at the outside edge & progress towards the rim, I imagine it would depend on the shape of the object struck as to what forces were imposed onto the wheel?
Rob

 

[buzyg]

I'm not convinced the cracks in the wheels occur thro impact damage !
The crack appears to start at the outside edge of the rim - surely if it was impact the crack would start at the inside edge, not the outside?

Hmm, not sure about that-what's the formula for pi again? :? :wink:
Rob

I can check with Gigsters tomorrow. Think it's meat & potato.

 

[ronk]

I would expect it to start at the outside edge & progress towards the rim, I imagine it would depend on the shape of the object struck as to what forces were imposed onto the wheel?
Rob

Look at it like a simple wooden cart wheel hitting a brick on the road - the inner rim would be the start of the fracture in my opinion . The split would propagate towards the outside edge as the inner surfaces would be the area under tensile load.

 

[srhutch]

The impact damage probably occurs away from the crack, not directly on it, so the compression elsewhere is released by the split a few inches away.

 

[Marlon]

Cheers Rob, I worked that bit out :wink: , he had a knackered tyre too. I just thought the video was a bit odd. :?

This is the latest thing - videoing service/faults. I think its a great idea

Apart from when it's a video nasty
Rob

Yeah - sorry yours wasn't good news

 

[Pastry]

Hey Rob,

I Know a bloke just down the road from me with a Zed with 326's and new non run flat rubber.........

I've got a trolley jack, meet you there in half an hour

Was that the one you said could do with a refurb anyway?

Stu.

Great idea! But surely Pastry will know it's us? :lol:
There was only 1 wheel with no scuffs anyway so it was on the cards. Il just be left with a wallet that's scuffed after this episode...
Rob

Oi oi, I'm not falling for that one you pair of bounders! :telloff:
Now if I remember right..... "finally got a car with grown up wheels Rob, hope they haven't got RF's on them' Is it at this point an unkind person would say I told you so?.... I TOLD YOU SO :roll:

 

[Pastry]

It could have been worse Rob, I was expecting a video of the engine bay showing someone had pinched two of the cylinders

 

[ronk]

The impact damage probably occurs away from the crack, not directly on it, so the compression elsewhere is released by the split a few inches away.

Then the tensile forces would be at either end of the the compressed / impact area?

I would like to see some proper abslysis of a damaged wheel. We can only guess from our armchairs.

As a 326 user I'm concerned . I used these wheels with runflats for four years without problem but Sod's law being what it is, the new cars wheels are in some jeapody

 

[Smartbear]

It could have been worse Rob, I was expecting a video of the engine bay showing someone had pinched two of the cylinders

I can see a drag race occurring on foreign lands :lol:



Rob

 

[Busterboo]

I've ordered some non-runflats already & will get all 4 wheels refurbed after the cracks been repaired, it's only £30 for the repair so not the end of the world.
Rob

Come on, Rob. Don't have the cracked wheel repaired! Replace all 4 wheels with a different make.

Please remember that you are looking at a major safety issue here.

It doesn't matter who's right or wrong about why the wheel cracked. The fact is it cracked and, if it can crack, one or more or all the other wheels on the car can crack, too.

So, play safe. Bin 'em and buy wheels that don't crack.

(If you don't believe me, ask your wife what she thinks. )

 

[Smartbear]

I've ordered some non-runflats already & will get all 4 wheels refurbed after the cracks been repaired, it's only £30 for the repair so not the end of the world.
Rob

Come on, Rob. Don't have the cracked wheel repaired! Replace all 4 wheels with a different make.

Please remember that you are looking at a major safety issue here.

It doesn't matter who's right or wrong about why the wheel cracked. The fact is it cracked and, if it can crack, one or more or all the other wheels on the car can crack, too.

So, play safe. Bin 'em and buy wheels that don't crack.

(If you don't believe me, ask your wife what she thinks. )

No need to be so hasty busterboo, changing the runflats stops the issue from occurring as well as giving better ride quality
Rob

 

[buzyg]

Bears drag racing

:lol:

Knew you had to do something at weekends other than drive the Zed,

 

[Smartbear]

Bears drag racing

:lol:

Knew you had to do something at weekends other than drive the Zed,

Ehh? Moi? Oh that! :wink:
Rob

 

[Busterboo]

No need to be so hasty busterboo, changing the runflats stops the issue from occurring
Rob

Rob, wheels that have cracked and may or may not crack are ... not safe.

Bin 'em.

 

[defrinz4]

Chris_D
Please tell me about the bike rack on your Z.

 

[Smartbear]

No need to be so hasty busterboo, changing the runflats stops the issue from occurring
Rob

Rob, wheels that have cracked and may or may not crack are ... not safe.

Bin 'em.

Any alloy wheel could crack if you hit something hard enough, are you going to be throwing all your wheels away?
As I've already mentioned, changing from runflats stops the issue. Now stop worrying about my wheels as they are no more dangerous than you picking up a puncture
Rob

 

[enzed4]

No need to be so hasty busterboo, changing the runflats stops the issue from occurring
Rob

Rob, wheels that have cracked and may or may not crack are ... not safe.

Bin 'em.

Any alloy wheel could crack if you hit something hard enough, are you going to be throwing all your wheels away?
As I've already mentioned, changing from runflats stops the issue. Now stop worrying about my wheels as they are no more dangerous than you picking up a puncture
Rob

Relax Smartbear - he just wants you to bin 'em so he can do some dumpster diving and score a set of 326's

 

[srhutch]

The impact damage probably occurs away from the crack, not directly on it, so the compression elsewhere is released by the split a few inches away.

Then the tensile forces would be at either end of the the compressed / impact area?

I would like to see some proper abslysis of a damaged wheel. We can only guess from our armchairs.

As a 326 user I'm concerned . I used these wheels with runflats for four years without problem but Sod's law being what it is, the new cars wheels are in some jeapody

Yes the stresses would be at either end, but one will always give first so releiving the stress.

 

[Pastry]

It could have been worse Rob, I was expecting a video of the engine bay showing someone had pinched two of the cylinders

I can see a drag race occurring on foreign lands :lol:



Rob

What goes on tour, stays on tour Rob :wink:

 

[Wrs]

I feel your pain Rob. Been there, done that (well kind of.. I ended up buying a set of MPSS & replacement rear 326 M in the end - long story).

It's seems like it is down to luck for BMW dealers to carry out a run out test and replace FOC. Vines in Guildford were having none of it, despite me having AUC warranty.

I hope your happy with the weld repair & new rubber.