Wheel PCD drilling

[rockheadrumble]

Hi All

I have a set of Rial deep dish alloys that are a BMW 5 x 120 PCD. I want to get a new PCD re-drilled to 5 x 108. They have a solid flange on the back so drilling should be straight forward.

I have been in contact with TT tools who can do it but its quite expensive.

Can anyone recommend a company that does this?

Thanks

Joe

[Laird Scooby]

Originally Posted by rockheadrumble

Hi All

I have a set of Rial deep dish alloys that are a BMW 5 x 120 PCD. I want to get a new PCD re-drilled to 5 x 108. They have a solid flange on the back so drilling should be straight forward.

I have been in contact with TT tools who can do it but its quite expensive.

Can anyone recommend a company that does this?

Thanks

Joe

What is the offset on the BMW wheels? If it's 15-25 that's the same as the 940 but if it's the 35-45 offset, you'd be better off using a set of hubcentric adaptors to compensate for the incorrect offset and change the PCD.
Chances are, hubcentric adaptors will be cheaper than having the wheels machined and won't weaken the wheels either.

You'll probably also need spigot rings for the centre of the hub/wheel to centralise the wheel. You may also need spacers if they are the correct offset if the wheels are too wide, i'm not sure what too wide is on the 940 but someone will know.

[rockheadrumble]

Originally Posted by Laird Scooby

What is the offset on the BMW wheels? If it's 15-25 that's the same as the 940 but if it's the 35-45 offset, you'd be better off using a set of hubcentric adaptors to compensate for the incorrect offset and change the PCD.
Chances are, hubcentric adaptors will be cheaper than having the wheels machined and won't weaken the wheels either.

You'll probably also need spigot rings for the centre of the hub/wheel to centralise the wheel. You may also need spacers if they are the correct offset if the wheels are too wide, i'm not sure what too wide is on the 940 but someone will know.

Hi mate.

They are low offset wheels with a proper dish and flat spokes, i think from memory when i measured ages ago that a pcd altering adaptor would make them stick out to much. . They are super wide though so i may need spacers as well. They are staggered widths. The fronts should be fine without spacers but the rears ones are 9.5" wide

Thanks

Joe

[Laird Scooby]

Originally Posted by rockheadrumble

Hi mate.

They are low offset wheels with a proper dish and flat spokes, i think from memory when i measured ages ago that a pcd altering adaptor would make them stick out to much. . They are super wide though so i may need spacers as well. They are staggered widths. The fronts should be fine without spacers but the rears ones are 9.5" wide

Thanks

Joe

That sounds like they're from something like a 3-Series with the wide rear wheels and not quite so wide fronts. I suspect you'll have to widen the arches somehow to cover the tyres no matter how you fit them and your turning circle will almost certainly increase, perhaps to levels that make life difficult for you if it's a daily as well.

Anything is possible if you throw enough time and money at it but is there not a better choice of wheel that would still look good for you but be a lot easier to fit?

[Chooch84]

9.5's on the rear will definitely require some arch rolling/ fender flares.

With regards to re-drilling have you contacted a normal engineering shop/firm that has a milling machine that is large enough to hold an alloy wheel and a suitable rotary table set up?

[Jimsiss]

Originally Posted by Chooch84

9.5's on the rear will definitely require some arch rolling/ fender flares.

With regards to re-drilling have you contacted a normal engineering shop/firm that has a milling machine that is large enough to hold an alloy wheel and a suitable rotary table set up?

Or a mill with a digital readout with a PCD setting on it, then they just set the X and Y to what it says on the DRO and drill the new holes. Any competent machine shop should be able to do it but you may require the old holes welding, Aluminium welding is a bit more specialised.