121 replies to this topic

[dattoman]

Its feasible

 

The reason its a no - no under most circumstances is because people use the wrong studs and centre hole size

Not to mention stupid offsets with no dish

[76lxhatch]

You would also need to make sure that the splined shank of the wheel studs differ similarly in diameter, they are often not the same size as the thread. Generally newer ones are likely to be larger so shouldn't be an issue when upgrading to larger studs.

I'm not sure why you would want to put Commodore stud pattern on an HQ rotor on a Torana though, then you'd have to run Commodore wheels with unsuitable offset? Would be a much more useful proposition for adapting larger Commodore brakes by fitting bigger 1/2" studs to get it back to HQ pattern.

[Dr Terry]

Wheel hub adaptors are not road legal AFAIK, in NSW anyhow.

 

Dr Terry

[ls2lxhatch]

There is an article on wheel adaptors and spacers in the Street Machine Dec 2006 issue page 127. They reported that unless there were a factory option, wheel adaptors and spacers are illegal in all states and territories.

 

Personally I would not trust an adaptor bought on eBay. If you do loose a wheel and have an accident then your insurance company will have to option of refusing the claim. 

[dattoman]

Someones telling you stories

DBA014X is HQ pattern

Drilled and slotted rotor

[warrenm]

If it is welded it is no longer a spacer, it is part of the drum/disc.

[el_jay_72]

So digging up an old thread again. I am wondering if commodore stockies can be drilled out to suit hq stud pattern?

There are some wheels advertised as hq stud pattern but they are definitely 15” commodore wheels and I wasn’t sure of how they could be hq stud pattern




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[Marks LXTorana]

This seems the best place to submit my query to the collective brains trust!

I have had my 2/77 LX Torana for about 6 years and I have never stuffed around with the front end because it is soooo goood! It handles, corners, nil bump steer, and keeps the wheels planted. BUT I have always been worried that the original B45 Simmons wheels don't match the PCD exactly. Can anyone tell me from the photo if this would represent the difference between 120mm studs and 120.65 wheel PCD?

If so, can I readily change the rotors to the larger PCD with everything else remaining the same? What would I be ordering; HQ rotors?

I don't want to change the wheels as these are my all time ever favourite wheel.

 

Attached Files

•  front wheel.jpg   207.84K   3 downloads
•  front rotor.jpg   150.95K   5 downloads

[neglectedtorana]

Hi Mark,

 

I don't know the answer to your question, I do see what you mean about the wheel nuts not looking centred and as it looks like they are all closer to the centre it could make sens as the Commodore pcd is small.

I would guess there is some sort of serial number on the Simmons centres and if you called Tempe Tyres they might be able to i.d. the pcd.

Just an idea.

 

Good luck

 

Cheers, Tom

[yel327]

Not sure what you mean that we can tell by the photos?

I assume those are HQ rotors which will be 4.75” PCD which is 120.65mm. Are the wheels 120mm? Just buy new HQ rotors drilled to 120mm. Probably from Hoppers.

From the photo though it looks the other way around, like the wheels are HQ 4.75” and the studs are 120mm?

What about the rears?

Edited by yel327, 19 June 2020 - 06:47 PM.

[76lxhatch]

A close up on the wheel fitted with a single nut removed may help, the wheels obviously have clearance machined around the nut that is offset (probably because the nuts are so close to the centre) which makes it look a little odd, but we can't see the tapered seat itself. If it wasn't right you'd also see uneven wear on the inside or outside only of all seats in the wheel.

[dattoman]

If you are buying new rotors... I would do the following

 

Buy DBA014 undrilled rotors (I like slotted... but not drilled)

Same as you have but no holes and no studs

Then I'd take one wheel and the new rotors to an engineering shop and have them drill the rotors to suit the wheels

I'd also fit half inch studs... or at least 12mm commodore metric ones

Just means getting new studs and nuts... not a biggie in the scheme of things

 

Then you know the stud pattern matches the wheels

And for how often you replace rotors... not really an issue about having to do it again in 10 years.

[yel327]

Do you get the caliper hitting on full lock? I remember when I first put Holden rotors on my LX I put HQ calipers at the back like you have and they hit on full lock. Only choice was to fit UC calipers on the front with Holden carriers and UC steering arms. I changed to a full UC front end in at the same time. I couldn’t get A9X calipers at the time.