Widening Alloys

[Jarred]

For interest's sake, it's also illegal to redrill the PCD of wheel's too.

Do you mean things like re-drilled multistud wheels are illegal?

[Oneofthegreats]

Do you mean things like re-drilled multistud wheels are illegal?

If you have a set of 4x112 & get them redrilled to anything incl. 4x100, it is illegal & unRWC.

If you buy a set of multi-pattern wheel's as built by a manufacturer like weld wheel's etc., it's ok.

[intensem1]

I’m simply quoting what was said on LS1 forums.

There are many things outlined by Transport Groups Australia wide, and lots of legalities behind the fitment of any aftermarket wheels or modification to a vehicles track.

While it is stated that the widening of wheels by means of a spacer/adapter is illegal.

There is no mention/rule that, widening or redrilling an alloy wheel is illegal.

[WABIT]

this is true....

dom

[Oneofthegreats]

Don't know about other states but,

Take a closer look.

"Weld's or any other type of repair or modification on wholly cast wheels or cast structural component's of wheel's are unacceptable".

I also found that on car's equipped with diagonally split braking system, your not allowed to change the offset of your wheel's or change the track.

Look's like all Mk1's have to retain the ET45. Ha ha. Yeh right!

[intensem1]

Where’s that quoted from?

[Oneofthegreats]

Where’s that quoted from?

RWC book.

I did have my ticket a while ago.

You can also interperet a redrill as damage to a structural part of the rim & thus UnRWC.

[intensem1]

Interesting to know, haven’t heard that before, guess the laws in SA are older since we don’t have RWC.

Also funny that you can buy new wheels as blanks and have them drilled to your desired stud pattern.

[Oneofthegreats]

Update!

Just found this in some of my paper work & it's a Vehicle Standard's Document.

"The wheel must be one designed for the particular hub/axle in respect to bolt pitch circle diameter & wheel nut tapers. Wheel with slotted stud holes are not permitted."

[Oneofthegreats]

Interesting to know, haven’t heard that before, guess the laws in SA are older since we don’t have RWC.

Also funny that you can buy new wheels as blanks and have them drilled to your desired stud pattern.

Yes, but you can also buy lowered spring's & alot of other product's that make your car illegal too.

[intensem1]

"The wheel must be one designed for the particular hub/axle in respect to bolt pitch circle diameter & wheel nut tapers. Wheel with slotted stud holes are not permitted."

Interesting quote, In the case of VW, off the shelf wheels generally don’t have ball seated holes, is it legal to change the bolts to match the wheels?



You are correct that many illegal items are available for purchase, so like anything it’s up to the user if they choose to run these modifications.

[Spyda]

I never thought you guys cared so much about what is road worthy or "legal".

[Jarred]

I never thought you guys cared so much about what is road worthy or "legal".

Doesn't hurt to know.

Just incase we're going for roadworthy. Or find little yellow stickers on our windows.

[roccodingo]

It has been done, this is what i found when searching few weeks back.



Its totally illegal, after much searching and phonecalls, I came to realise that no one in Australia would do it.
Every shop I called would say the same thing. If it fell apart, I could be killed (expecially if hurtling along at 120+MPH).

A performance shop in Sydney was able to orchestrate the work for me though. I had to go through them, and from there I now know the wheels were shipped to Labrador, Queensland to be done.
(You might be able to work out who might have done it, as I since have, but am not going to name the place publicly).

I specified that I wanted to extend the 8" wheel to 9".
I could have gone as large as I wanted. I was thinking about 9.5" but didn't want to have clearance issues.

As the process only affects the inside of the wheel, not the hub placement, you will need some spacers. I had custom spacers machined up.
As my inner edge was now 25.4mm closer to the strut, I had 15mm spacers made, and then had to subsequently machine the right hand side in to be a 12.5mm spacer to stop rubbing.
Guards were rolled aswell.

As stated elsewhere, it was about $700 for the widening and shipment of two wheels. (this included the costs of two 17" wheels being cut up aswell - remember you need 4 wheels to make 2 wider ones).
About $700 for two Mickey Thompson 17" 275's and I think $80 for custom spacers. Plus associated fitment of rubber costs aswell.
Not exactly a cheap process. You could probably get two second hand 17" 3-piece simmons and then have appropriate offset in the width youu want made for the same money.

I however wanted to be stealth, so chose the same alloy rims that I drive around with everyday.

The alloy rims are precision welded on both sides of the rim, and in reality should be bloody strong.
I only got them for drag racing, so figured that in a straight line, they would be reasonably safe. I definitely wouldn't do circuit work on them - but I am a bit of a worrier

The performance shop reckoned they would be fine to use as a daily driver, but the roads in sydney are so bad, i'd never chance it.
I do however (on my two trips to the drags) put them on at home, and don't need to worry about changing tyres.

So what did they do to heat treat the wheels back to the original specification ???

Cast alloy ( and likely all alloy multi piece ) wheels are heat treated to give them the necessary strength, once welded , you kill the heat treatment in the weld HAZ, basically engineering in a weak point. The company that has done this would want a damned good lawyer, as in case of any event the owner of the vehicle, modifier of the wheel and the engineer who oversaw the process ( if there was one , doubtful ) would be up for some serious charges to answer, specially if a death has occured.

I have seen factory unmodified cast alloys break completely around the rim. ( into 2 round sections ) the guy was trying to sue GM for damages..

Fine if you need to modify the wheels, but do it in a safe engineered way, a wheel can be replaced a hell of a lot easier than a life...

[jayjay]

mmm... i'm skeptical about widening alloys.

.
. . split rims ftw!!