Damn & blast

[Marlon]

What's that all about.

He has a cracked wheel.

Standard equipment on these I believe.

Cheers Rob, I worked that bit out , 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

[Smartbear]

He has a cracked wheel.

Standard equipment on these I believe.

Cheers Rob, I worked that bit out , 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

[ronk]

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?

[Smartbear]

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? Put a call out for Sars, she would probably know that stuff
Rob

[ronk]

The number π is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159

That aside - apply a force at the rim towards the rim's axis - where would you expect the crack to start? I would consider the extreme outside edge to be under a compressive load?

[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?
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 , 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?
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!
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

[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



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. )