I am looking at putting new wheels on the croc. I think it will be the 18' Techart Formulas. The guy at wheelenhancement.com told me that the Techart wheels have an 8.5 diameter for the fronts and 10.5 for the rear. He says the stock Pilots will fit. He then tells me that I will need 15mm wheel spacers for these wheels. Are those wheels going to stick out from the fenders?
My questions/concerns are 1) Is he right, will the stock tires fit on those widerrims; 2) I would think with putting on wheels that are wider than stock you wouldn't need spacers?
Any guidance here is greatly appreciated.
It probably means that the wheel offset is different from stock, and you need the spacers to make up the difference. The wheelenhancement guys in my experience know what they're doing.
brad
Pardon my ignorance Brad but what does it mean by 'offset'. I really havent done much of anything with prior cars in the modifiaction arena
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<span class="textTight">Wheel Offsets[/quote]
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<td class="text" width="429" colspan="2">The offset of a wheel is what locates the tire and wheel assembly in relation to the suspension. More specifically, it is the measured distance between the hub mounting surface and the center line of the rim. Below is an explanation of the various types of offsets which are pictured in the above graphic.
Positive Offset
A positive offset occurs when the hub mounting surface is on the street side (the side you see) of the center line of the rim. Most factory rims will have this type of offset.
Zero Offset
When the hub mounting surface is centered within the rim, it is known as a zero offset.
Negative Offset
If the hub mounting surface is on the brake side of the center line of the rim, it is considered a negative offset or “deep dish”.</td>
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Note that extensive negative offset can potentially cause increased steering wheel kick-back and place additional stresses on the vehicle's entire suspension.
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Hope this helps..
Amer,
Hey, no worries... That's a great graphic description - all wheels are made differently - Porsche has theirs made to spec for their cars, but after market wheels can differ in their offset as explained by the graphic. 15mm of difference isn't really very much - a little over half an inch or so... it shouldn't be a problem.
brad
Thank you very much for the lesson guys/fckeditor/editor/images/smiley/MWPX/lightbulb.gif. It makes all the sense in the world to me now. Damn, I love this forum./fckeditor/editor/images/smiley/MWPX/teeth_smile.gif
8.5' and 10' refer to the width of the wheels and effect the offset. My suggestion would be to find wheels that will not require any spacers and have to correct adjusted offset considering the width.
Techart being a Porsche tuner should produce wheels that don't need spacers, but to save costs they have a set of wheels designed for the 911's offset and Boxter/Cayman need spacers. It gets even worse with the 19' - you have to roll your fender - I know there are tools to do that, but many times it is done with a baseball bat /fckeditor/editor/images/smiley/MWPX/whatchutalkingabout_smile.gif I like the look of their wheels, but when changing wheels I would never go with the same size as stock unless racing where wheel weight would be a big factor. That leaves 19' or 20' - both would require fender roll and I just can't see myself taking a bat to my car /fckeditor/editor/images/smiley/MWPX/confused_smile.gif
