Only going from what I see....... The ebay add looks like you would be going from a hub centric wheel design, to a lug centric design. You will need rims that are lug centric. Knowing Mustangs, the Saleen wheels are hub centric.
Wish that I could help you out on the size wheels that you need.
[This message has been edited by Tony Kania (edited 12-02-2010).]
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11:11 PM
katatak Member
Posts: 7136 From: Omaha, NE USA Registered: Apr 2008
Also remember that the adapters you posted are 1.25" thick - any wheel you get will have to have that much offset plus the stock Fiero offset. And as Tony pointed out, there will be issues with Hub Centric wheels. I do not believe that any Ford or GM wheels will have enough offset to "fit" the Fiero. Your tires will most likely be "sticking out" past the fenders!
[This message has been edited by katatak (edited 12-02-2010).]
You can't fit any 9" rim on the front of an '88 Fiero unless you do a widebody. Putting an 18x9 on the rear is do-able, if you get the hubs and rotors re-drilled to a 114.3 mm bolt circle. Then you need wheels with a 42 mm - 46 mm offset.
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11:35 PM
Tony Kania Member
Posts: 20794 From: The Inland Northwest Registered: Dec 2008
It has to do with how the wheels are centered to the axle. Hub centric means that the center hole of the wheel is a close machine fit to keep the wheel centered. Lug centric means that the wheel nuts do the centering. Lug centric wheels most commonly use a taper seat nut but sometimes can be "mag style" also known as straight shank design.
"The centerbore of a wheel is the machined opening on the back of the wheel that centers the wheel properly on the hub of a vehicle. This hole is machined to exactly match the hub so the wheels are precisely positioned as the lug hardware is torqued down. Keeping the wheel precisely centered on the hub when it is mounted will minimize the chance of a vibration. Some wheels are vehicle model specific and will come from the factory with a bore machined to match that vehicle. Some wheels are designed to fit multiple vehicle models and will use a centering ring system to reduce the bore size to match the hubs of different vehicles. These rings keep the wheel precisely positioned as the lug hardware is torqued down.
Some wheels are non-hubcentric by design. These are known as lug-centric wheels. With these wheels it is critical to torque the lug hardware with the vehicle on jack stands, off the ground. This allows the nuts or bolts to center the wheel and torque down without the weight of the vehicle pushing them off center."-The Tire Rack
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11:37 PM
katatak Member
Posts: 7136 From: Omaha, NE USA Registered: Apr 2008
Wheels that are "hub centric" means that the hub has a ring or lip that fits snuggly into the center bore of the wheel. This is how the wheel is "centered" on the hub and they usually use lug nuts with a shoulder. Lug Centric wheels "center" as the cone shaped lugs are tightened down. The Fiero uses both actually - they have a ring or lip on the hub that fits into the center bore and they use a cone shaped lug nut. Many modern wheels are "Hub Centric" and require the ring/lip. If your adapters are "hub centric to the hub and Lug Centric on the whlle side, then you will need wheels that are Lug Centric. After looking at the EBay add closer, these are not hub centric/hub centric. I also see where it gives a warning about offset too!
Edit to add - Wow - I got beat out by a bunch! I'm getting slow in my old age!
[This message has been edited by katatak (edited 12-02-2010).]
Thanks for the info it was just a thought and I rather ask before buying anything Like they say asking questions makes you look dumb for a minute but not asking well that's just wrong thanks again for the info guys
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11:53 PM
Isolde Member
Posts: 2504 From: North Logan, Utah, USA Registered: May 2008
I've got 17x9 Cobra R's on my front using Saturn Vue hubs on Pontiac Solstice knuckles.
The wheels require taper seat lug nuts, so even if the adapter does not have a pilot hub surface the lug nuts will center it. But keep an eye out on your total offset, these are pretty wide wheels.
------------------ yellow 88 GT, not stock white 88 notchie, 4 banger
[This message has been edited by ccfiero350 (edited 12-03-2010).]
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09:19 AM
Isolde Member
Posts: 2504 From: North Logan, Utah, USA Registered: May 2008
Are you sure they're 9s? Because those have been made in 8s also. Maybe you're measuring wrong? The correct way is between the tire beads, not at the widest parts of the outboard lips. Second, '88s can't fit as wide as '84-'87. An 8 with a +42 - +46 offset will fit the front of '84-'87 just fine.
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09:56 AM
Tony Kania Member
Posts: 20794 From: The Inland Northwest Registered: Dec 2008
Are you sure they're 9s? Because those have been made in 8s also. Maybe you're measuring wrong? The correct way is between the tire beads, not at the widest parts of the outboard lips.
Ummm, pretty sure, I even made a mock up wheel section.
------------------ yellow 88 GT, not stock white 88 notchie, 4 banger
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03:03 PM
Isolde Member
Posts: 2504 From: North Logan, Utah, USA Registered: May 2008