I love the wheels and tires pictured below. I IMd the guy who bought them in the mall and got no reply.

With the exception of lowering I have a dead stock 87GT I would love to put this combination on. How do I know what will fit and look good? I believe these are 18" in front and 19" in rear.

BTW- I still use stock-type struts in the rear.

quote Originally posted by sjmaye: I love the wheels and tires pictured below. I IMd the guy who bought them in the mall and got no reply. With the exception of lowering I have a dead stock 87GT I would love to put this combination on. How do I know what will fit and look good? I believe these are 18" in front and 19" in rear. BTW- I still use stock-type struts in the rear.

The first thing you need to make sure of is that the offset is correct, and that the bolt-pattern spacing is also acceptable for the Fiero. In terms of fitting under the wheel well, you want to measure the sidewall height of the tire, double it, and add it to the diameter of the alloy wheel. Then, take a yard-stick or a tape measure and see if that will fit in your wheel well, both vertically from the ground to the top, and horizontally (front and rear of the opening of the tire well).

The Fiero wheel openings are actually quite large, really... so you can usually fit large tires in there. Same goes for the front, although if the tire is too wide, you'll rub the plastic wheel wells (and inner frame) when you try to turn too sharply.

Hope that helps some, otherwise... free bump.

------------------
Todd,
2006 Pontiac Solstice
2004 Volkswagen Beetle Convt. (Wife's)
2002 Ford Crown Victoria LX
1987 Pontiac Fiero SE / V6
1981 EZ-GO Xi875-A "Miami Dolphins" Medical Cart
1973 Volkswagen Type-2 Transporter
1973 Oldsmobile Cutlass Supreme 350

after searching for HP D (all i can read from the pictures), it came up with 'HP Design', and i found these:




They are the HP Racing HPR5 Rims

Bolt Pattern: 5 x 100
Offset: 38

And the available sizes are

17 x 7
18 x 8
18 x 9
19 x 8.5
19 x 9.5
20 x 9.5

[This message has been edited by kawana (edited 11-12-2008).]

What is the proper offset range for a Fiero?

I am back at this again. Same wheels.

Yes- the size is 18" x 8" with a 38mm offset. From the Joe Torma diagram it appears they will fit my 87GT OK. May stick out a few millimeters. My biggest concern now is tire choice and rubbing of wheel wells and struts. My 1987 has the Intrax springs so it is lowered ~1.8".

I highlighted the size of these wheels in yellow.

That is a nice pic for offsets and sizes, But the stock offsets are slightly wrong for the 88GT rear and the 86/87 GT wheels.
Here are all the wheels/offsets:

13” X 5.5 Steel or Turbo Fin have a 42mm offset.

14” X 5.5” Steel Wheels have a 42mm offset.

14” X 6” High Tech Aluminum have a 35mm offset.

15” X 7” Diamond Spoke for 86 and 87 have a 30mm offset. (see edit)

1988 15” X 6” Diamond Spoke fronts have a 37mm offset.

1988 15” X 7” Diamond Spoke rears have a 30mm offset. (see edit)

EDIT: The OSG specs are incorrect. The above is the correct offsets (GT Diamond Spoke's were measured by Jazzman)

[This message has been edited by Oreif (edited 01-22-2009).]

Thanks Orief. That kind of stinks, though. I just want to know if I bought these wheels what size tires I could get in there without rubbing fender liners and struts.

Any tips?

Measure the offset and the width of the wheel. The chart you posted will let you know if they will rub or not.
Just looked up the wheels on the vendors website:
http://www.hpdesignwheels.com/wheels.html

The 18" come in 8" or 9" widths, If it's the 8" width they will fit. If they are the 9" width and have an offset of 20mm they will fit. If the offset is more they will not.

The 19" wheels come in 8.5" or 9.5" If it's the 8.5" width they need to be 35mm offset or less. If it's the 9.5" they will not fit.

Remember the width is the inside bead to bead not the outside lip so if you measure 8.5" width outside to outside edge it is an 8" wheel.

quote Originally posted by Oreif: That is a nice pic for offsets and sizes, But the stock offsets are slightly wrong for the 88GT rear and the 86/87 GT wheels. Here are all the wheels/offsets: 13” X 5.5 Steel or Turbo Fin have a 42mm offset. 14” X 5.5” Steel Wheels have a 42mm offset. 14” X 6” High Tech Aluminum have a 35mm offset. 15” X 7” Diamond Spoke for 86 and 87 have a 35mm offset. 1988 15” X 6” Diamond Spoke fronts have a 37mm offset. 1988 15” X 7” Diamond Spoke rears have a 42mm offset.

Are you sure of those offsets? I had alway heard the 1988 rear diamond spoke was the same wheel as the pre-88 diamond spokes. Here is a thread that supposedly measured all of the diamond spokes.
https://www.fiero.nl/forum/A...29-2-040757.html#p17

All that being said, how can I determine how much meat I can put on the wheels without rubbing?

[This message has been edited by sjmaye (edited 01-22-2009).]

quote Originally posted by sjmaye: Are you sure of those offsets? I had alway heard the 1988 rear diamond spoke was the same wheel as the pre-88 diamond spokes. Here is a thread that supposedly measured all of the diamond spokes. https://www.fiero.nl/forum/A...29-2-040757.html#p17 All that being said, how can I determine how much meat I can put on the wheels without rubbing?

Hmmm, Since Jazzman physically measured the offset between the wheels in question, Then the OSG specs are incorrect. (I am going to edit my post above to reflect the proper offsets)

As for tire sizes, The largest recommended size of tire for an 18 X 8 wheel would be 235/50R18 but it will rub the strut with a wheel offset of 35mm or more. For a Fiero the best size would be 215/40R18 as long as the offset is 40mm or less. For the 19 X 8.5 wheels, the best size would be 225/35R19 as long as the offset was 30mm or less.

Have you measured the wheels yet? What size tires are on them?

I do not own these yet. I have always liked these rims and have found some. They are new, so there are no tires on them. Thank you for the tire recommendations. I think that will give me what I need .

OK. Got the tires and wheels mounted and put them on my 87GT. I love them. The only thing that "sticks out" (literally) are the wheels in the front. Not by much, grant you, but I can notice it.

Seeing what it would look like on the diagram above does not give you a good feel of how they will look on the car. This is why I would be really wary of putting these same wheels on an 88. I know they would stick out too much. It is a shame because I would love a set just like them for my 88 as well.

How can I get a wheel just like these with like a +55 offset for the front?

[This message has been edited by sjmaye (edited 02-05-2009).]

I will be looking at wheels soon. If you could post picks and the sizes, Im interested in what they look like. Nice looking rims.

Steve

Not great pics, but here they are.

The wheels are:

18 x 8 w/42 mm offset (F) 225/35/18 tires
(high offset to work with 88�s front susp or even 84-87)
19 x 9.5 w/ 38 mm offset (R) 275/30/19 tires


The fronts sport a 2" lip, with the rears offering a 3 " lip and they are HP brand

The wheels on the black car pictured above are all 18" x 8" with +38 offset. The tires are 225/40/18 in front and 235/40/18 in rear . No rubbing!