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-   -   Wheels? (http://www.haynes.co.uk/forums/showthread.php?t=4019)

jasongray5 3rd April 2010 05:20 PM

Wheels?
 
Ive found some nice alloys close to me, and would like your opinions on weather they are a good bargin and the the right offset?
CLICK!

Cheers guys

deezee 3rd April 2010 05:37 PM

The correct offset is around 38 ish. So these are going to stick out an additional 15mm. Its hardly going to upset anything. Bear in mind that the fibreglass rear arches from Triton / Saturn stick out 25mm further than the "correct" offset wheels anyway. So yours would just fill the arches more.

HandyAndy 3rd April 2010 06:09 PM

:eek: I personally couldn,t say the word "bargain" :eek: but then again you know how tight I am :D

For a similar cost "Halfrauds" are doing 4 wheels with tyres ;)

cheers
andy

Big Vern 3rd April 2010 06:14 PM

At 7 inch wide you'll need an ET of 41 or maybe even 44 to get the correct offset ie centre line of the wheel rim in the same location as the 'book'.
I have a nice set of mk5 RS 2000 alloys for sale, which are 6x 15 et41, and would certainly suit.

HTH BV

geeman 3rd April 2010 06:16 PM

i got these from halfords for £230 about 2 months ago. Also its currently £260 without their"fit kit"...

deezee 3rd April 2010 07:42 PM

Quote:

Originally Posted by Big Vern (Post 35428)
At 7 inch wide you'll need an ET of 41 or maybe even 44 to get the correct offset ie centre line of the wheel rim in the same location as the 'book'.
I have a nice set of mk5 RS 2000 alloys for sale, which are 6x 15 et41, and would certainly suit.

HTH BV

Why would you need the wheel to sit 3mm closer to the car? The offset is a measurement to the centre of the wheel and is irrespective to the actual width of the wheel, be it 7 inches wide or 6 inches.

jps 17th January 2013 02:31 PM

Quote:

Originally Posted by deezee (Post 35440)
Why would you need the wheel to sit 3mm closer to the car? The offset is a measurement to the centre of the wheel and is irrespective to the actual width of the wheel, be it 7 inches wide or 6 inches.

Surely offset increases or decreases as width of the wheel changes, assuming that the 'outside' end of the wheel stays the same - otherwise offset is meaningless?

E.g. if a wheel is 100mm wide and the offset is 40mm it means the 'spoked bit' of the wheel is 10mm thick (i.e. the mounting face is 10mm inside the wheel - but on the outside edge). If the same wheel is 200mm wide and the 'spoked bit' of the wheel is 10mm thick then the offset would need to be 90mm??

*numbers made up for illustrative purposes...

voucht 17th January 2013 05:19 PM

1 Attachment(s)
Quote:

Originally Posted by jps (Post 87929)
Surely offset increases or decreases as width of the wheel changes

Sorry JPS, but I think you are mistaken, and I disagree with that.
The offset of a wheel is given by a manufacturer by the "ET".
ET is is the distance between the middle longitudinal plan of the wheel and the plan of the wheel's face against the car's hub.

Attachment 1585

You can have a 3'' wide wheel or a 9'' with an ET38, the offset will still be the same. Just the wheel will be wider, so wider outward AND inward

Hope I'm clear in my explanations :p

jps 17th January 2013 06:39 PM

Quote:

Originally Posted by voucht (Post 87931)
Sorry JPS, but I think you are mistaken, and I disagree with that.
The offset of a wheel is given by a manufacturer by the "ET".
ET is is the distance between the middle longitudinal plan of the wheel and the plan of the wheel's face against the car's hub.

Attachment 1585

You can have a 3'' wide wheel or a 9'' with an ET38, the offset will still be the same. Just the wheel will be wider, so wider outward AND inward

Hope I'm clear in my explanations :p

Ah ha!!!!! No idea why I was being so thick!!!

I was thinking that the offset was measured TO the centreline, rather than FROM the centreline. I was also making the assumption that wheels were made wider by just adding width to 'the inside' rather than widening inward and outward...

Silly me!

Not Anumber 18th January 2013 12:44 PM

I want to get hold of a spare wheel for long journeys as I dont trust the spray and pray cans.
Applying the knowledge above, do I need to look out for a Sierra (or other rwd Ford) steel wheel or could i get away with using something from a Focus or Mondeo ?


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