986 Forum - for Porsche Boxster & Cayman Owners

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-   -   Help, rim question (http://986forum.com/forums/performance-technical-chat/2955-help-rim-question.html)

fastdonkeys 06-21-2005 03:37 AM

Help, rim question
Does anyone know how big of a spacer I need to use for the turbo hollow twist 18x8 and 18x11 on my boxster. Thanks

Cold Warrior 06-22-2005 07:10 PM

Forget it.
11" rears won't fit. Period. End of discussion.


fastdonkeys 06-22-2005 08:53 PM

I'm making custom carbon fender flares so it will fit, just need to know how much spacer I need to clear the trailing arms.

Cold Warrior 06-22-2005 09:05 PM

Do you happen to know what the offsets are?
I think they are 63mm for the 11" rims but I might be mistaken. Assuming that is the case then you would need a 30mm spacer to clear the shock tower. This is based on my experience with a 10.5 x18 et40 rim that had about 1mm clearance from the rim to the shock tower tube without a spacer.


kajita 06-22-2005 09:07 PM

check the offset. its prolly in the high 50s or in the 60s. you need to add spacers to get it down to anywhere from 43mm to 47mm. i dont think any spacers bigger than 17mm should be put on. just my opinion.

RandallNeighbour 06-23-2005 07:46 AM

Get ready for suspension stress (repairs $$$) or a lot of cash outlay to beef up the suspension if you do this. The stock suspension only tolerates a 5mm spacer without doing damage to the suspension and axles, according to Porsche.

KRZTACO 06-23-2005 08:33 AM

Don't use a regular spacer, get a wheel adapter to space it out:


I've used adapters from them, the BEST, stongest and SAFEST. PLUS thier cheap. Everything machined in house, direct to your specs.

They will fit.


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