[Ryan]

I got the wheels sent to me to test fit.....no go. Size is 19x10.5" -52mm offset . Fronts are 8.5" -45mm offset and would not go over the front hubs even with grease cap removed. The fronts fit on the rear great.



Damn..I really liked these wheels...not very heavy either.        

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[968rz]

As I've read the forums over the past year I've notice allot of folks have had to "open up" the center of the rim with a Dremel to get it to fit over the hub center. Just a thought.

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[buskey]

So it sounds like fitting 47mm offset on the rear should NOT be a problem, right?



Got a line on a set of cup wheels (made in Italy, not Porsche factory) from a 911 owner. They are ET23/52mm 7.5x17 front & ET15/47mm 9x17 rear. Have tried much research but cannot confirm they will fit....any help??



Thanks!

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[flash]

ET 52mm on a 7.5 x 17 and ET 47mm on a 9 x 17 was EXACTLY what i had on my car when i got it - worked great

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[vnarma]

I don't think those will fit. They are early offset, likely from a '80's 911 turbo. With an offset of only 15ET, it will protrude a good inch outside the fender flares!

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[buskey]

This site says they will fit 968 and with your endorsement Flash, I'll trust that they will. Even if they don't, the price is good enough that I can resell and make a couple of bucks in the process.



http://www.pcars.com/shop.php/porsche/whee...eels/p_139.html

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[flash]

before you run out and buy them...



i don't get the 15 AND 23 there - which is it? 23 or 52? is it 15 or 47? that would be my concern, and what to find out first - it should be a 2 digit number indicating a millimeter measurement of offset, not a pair of numbers

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[buskey]

yeah, i'm still trying to understand the ET number vs. offset. looking at the link i posted, they show an ET15 wheel with a 47mm offset and an ET 23 wheel with a 52mm offset. i had the wheel owner confirm for me on the wheel stamped ET15 and he measured the offset at 47mm. i just assumed the ET number was some Porsche-specific coding number that equated to a certain offset because i so often see references to ET this and ET that.



can anyone comment or explain?? this whole wheel fitment calculation issue has been perplexing the crap out of me every since i bought my first 944 last year and started looking at upgrading the wheels.



keep in mind that my last go-round with fitting non OEM wheels on a car was in my 20's when you had the choice of upgrading to either 60's or 50's and back then that measuurement was tire width, not height..... <img src="/forum/images/smilies/968/blink.gif" class="smilie" alt="" />

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[vnarma]

ET is the short form of the German word 'Einpresstiefe' which literally translates as insertion depth. In otherwords Offset and ET are the same thing. A wheel of ET15 has an offset of 15.

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[flash]

yeah, but that does not explain an ET15/47



i've never seen that before - it has always been a 2 digit number, not a pair of them



i think the info on the link is bogus



by the way, those are aftermarket rims, and not the real thing - if it is the same mille miglia we have seen before, it is a fairly normal price for them too



call wheel enhancement

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[buskey]

OK, thanks, but still scratching my head though.....why do vendors like Wheel Dynamics & P-cars offer ET 15 wheels with a 47mm offset?

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[flash]

i don't think they do - i think their website is wrong

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[buskey]

Ok, i went to the guy's house to see the wheels. the rear wheel is stamped ET 15 and we measured the offset - it is 15mm. 130 from center to outside edge of wheel, 145 from back of hub to back of wheeel = +15mm offset!



   



quick reality check for me.....+15mm offset would allow the wheel to mount MORE deeply into the wheel well than say a -15mm offset, right?

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[buskey]

BTW - bought the wheels and tires. if they don't fit the 968 i've got other PCA buddies who will take them. got the mint condition wheels with brand new (i mean ZERO miles) TOYO Proxies on them for $800. he gave me the receipt for the tires alone - $1100.



thanks for your help guys!

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[Anchorman]

While it would seem that you got a great buy, I think you'll be reselling, rather than using, those wheels. Your example is directionally correct - a +15mm offset puts the center line of the wheel slightly inside the mounting surface; as the offset increases, the center line moves further inboard of the mounting surface, moving the wheel further and further inside the fender. However, our wheels are basically a high offset wheel, as can be seen by noticing that the wheels have almost no "dish" - the outer surface (spokes to rim) is pretty flat. The various sets of wheels I've had on my car (16", 17", and 18") have had offsets ranging from +52 to +47. The 47, on the 18" rear, resulted in some tire/fender interference - the outer edge of the wheel was too far out, or the wheel had too much "dish". I can only imagine the interference you'll have with a relatively deep dish 15 offset. However, I hope I'm wrong.

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[buskey]

thanks Anchorman, totally agree. will likely keep the tires and offload the wheels to someone to offset the cost of new wheels.



anyone out there have any gently-used 8/9 x 17" wheels to unload?

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