Can the offset be manually increased (from 32 to 35)?

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M-140i
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Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Mon Jul 17, 2017 10:50 pm

Before buying, I've read many opinions going in this direction: 8,5 ET35 front & lowering springs: OK !
I bought my rims, 8x18 ET32 front, with H&R springs, and surprisingly the 225 tyre very occasionally touches the arch. I think that 2 or 3 mm more in the offset would be enough to be quiet.
Strange... :roll:
Is there any way to win these few mm? From ET32 to ET35.
Any special tools? Dangerous?
Last edited by M-140i on Mon Jul 17, 2017 10:59 pm, edited 1 time in total.
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Re: Can the offset be manually increased (from 32 to 35)?

Post by marco_polo » Mon Jul 17, 2017 10:58 pm

You'd need to have the alloy machined down on a lathe or similar.

Whether the hub section of the wheel would be strong enough afterwards, who knows? Are they decent forged wheels, quality cast wheels, or some kind of cheapo Chinese reps?

Maybe contact the manufacturer to see if they'd recommend machining? (You might need shorter wheel bolts too??)
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Re: Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Mon Jul 17, 2017 11:02 pm

Marco, I've juste edited the first post.
Somebody have to tell me how is it possible that 8,5 ET35 does not touch and my configuration 8 ET32 touches...
I have less poke and I'm in trouble... :? :? :?

Edit: 8 ET32 = 3,3mm less poke than 8,5 ET35
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Re: Can the offset be manually increased (from 32 to 35)?

Post by Blind Pugh » Mon Jul 17, 2017 11:36 pm

I run 8” et34mm / 225/40/18 MPSS upfront with longer F8x lower arms and didn’t rub when I ran H&R sport springs

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Re: Can the offset be manually increased (from 32 to 35)?

Post by marco_polo » Mon Jul 17, 2017 11:41 pm

M-140i wrote:
Mon Jul 17, 2017 11:02 pm
Marco, I've juste edited the first post.
Somebody have to tell me how is it possible that 8,5 ET35 does not touch and my configuration 8 ET32 touches...
I have less poke and I'm in trouble... :? :? :?

Edit: 8 ET32 = 3,3mm less poke than 8,5 ET35
ET is basically the centre position of the tyre. If you move the centre of the tyre out 3mm, it rubs.

You have less alloy poke, but more tyre poke.

Going from 8" to 8.5" effects the stretch a little, but not the position/poke of the tyre tread.
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Re: Can the offset be manually increased (from 32 to 35)?

Post by Danny_Boy » Tue Jul 18, 2017 11:01 am

Read my pinned post above, it explains about offsets.

An et35 wheel will sit further IN the arch than an ET32.

ET32 will stick OUT 3mm further and an ET35.

the number is how far the hub mounting surface is from the centre line of the wheel. So higher number from zero the more the wheel sits in the arch.

But as Marco said, tyres make a big difference as a 225 Pirelli and a 225 Goodyear can be different widths as some tyres are oversized or undersized.
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Re: Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Tue Jul 18, 2017 11:17 am

I'm on 8x18 ET32 with 225x40x18. ;)
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Re: Can the offset be manually increased (from 32 to 35)?

Post by marco_polo » Tue Jul 18, 2017 11:32 am

M-140i wrote:
Tue Jul 18, 2017 11:17 am
I'm on 8x18 ET32 with 225x40x18. ;)
Which is why it rubs, yours (orange wheel and red tyre) is less stretched, but sticks out 3mm more at the shoulder:
M140i.jpg
M140i.jpg (29.13 KiB) Viewed 296 times

Have you contacted the wheel manufacturer about machining the mounting face down yet?
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Re: Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Tue Jul 18, 2017 6:33 pm

Ok ok Marco. Not so easy to play simultanely with offset, poke and stretch.
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Re: Can the offset be manually increased (from 32 to 35)?

Post by marco_polo » Tue Jul 18, 2017 6:40 pm

If anyone's ever in doubt, please ask. :thumbs:
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Re: Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Wed Jul 19, 2017 9:01 pm

marco_polo wrote:
Tue Jul 18, 2017 6:40 pm
If anyone's ever in doubt, please ask. :thumbs:

I received a reply from the (english) store. ('wheel**base**alloys.com')
They propose to collect the rims and remove 3 mm, to increase the offset (and decrease the poke).
I admit to be a bit dubious ...... :roll:
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Re: Can the offset be manually increased (from 32 to 35)?

Post by marco_polo » Wed Jul 19, 2017 9:12 pm

M-140i wrote:
Wed Jul 19, 2017 9:01 pm
marco_polo wrote:
Tue Jul 18, 2017 6:40 pm
If anyone's ever in doubt, please ask. :thumbs:

I received a reply from the (english) store. ('wheel**base**alloys.com')
They propose to collect the rims and remove 3 mm, to increase the offset (and decrease the poke).
I admit to be a bit dubious ...... :roll:
As long as the manufacturer has stated the hub section will definitely be strong enough once machined back, it will be fine.

Have they said if you will need shorter wheel bolts? You shouldn't do.....
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Re: Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Wed Jul 19, 2017 9:19 pm

marco_polo wrote:
Wed Jul 19, 2017 9:12 pm
M-140i wrote:
Wed Jul 19, 2017 9:01 pm
marco_polo wrote:
Tue Jul 18, 2017 6:40 pm
If anyone's ever in doubt, please ask. :thumbs:

I received a reply from the (english) store. ('wheel**base**alloys.com')
They propose to collect the rims and remove 3 mm, to increase the offset (and decrease the poke).
I admit to be a bit dubious ...... :roll:
As long as the manufacturer has stated the hub section will definitely be strong enough once machined back, it will be fine.

Have they said if you will need shorter wheel bolts? You shouldn't do.....
Here is the replies I received:
  • 1

Code: Select all

Thank you for your enquiry.

we can collect them and remove 3mm from the wheels to make them et35 front , for example. would that work ?

Thanks & Best Regards,
  • 2

Code: Select all

Thank you for your enquiry.

our engineer will check the wheels before and after but it should not affect the strength of the wheel. we will arrange collection
Thanks & Best Regards,
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Re: Can the offset be manually increased (from 32 to 35)?

Post by marco_polo » Wed Jul 19, 2017 9:20 pm

What make are they? Do they come in ET35 (or greater) from the factory?
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Re: Can the offset be manually increased (from 32 to 35)?

Post by M-140i » Wed Jul 19, 2017 9:41 pm

marco_polo wrote:
Wed Jul 19, 2017 9:20 pm
What make are they? Do they come in ET35 (or greater) from the factory?
Front, they come in ET32. No ET choice.
Rims are Calibre CC-R (see image in signature)
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