- Camaro and Firebird: Tires General Information and Specs
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4th Gen SS Wheels
Anyone know if the aftermarket replica wheels are good? Any issues with them? Where can I get the best deal on them at?
Also, will I need to calibrate the speedo, how far will it be off with wheels 1 inch bigger on it?
As I bought these many years ago, I have no idea who currently has the best deals.
245/50/16: 25.65"
275/40/17: 25.66"
That 0.01" difference is not enough to matter.
I've had no issues with the aftermarket versions of these wheels. I have a set in chrome on my '98 that has been on the car since 2005, and a set in silver that has been on my '02 since 2007. On both sets the finishes have held up very well, they balance properly, and they fit the car properly. My chrome set are correct factory SS sizing/offset (17x9", 50mm offset), while my silver set are the more common C4 sizing/offset (17x9.5", 56mm offset). Both sizes will fit a 4th gen F-body with no issues front or rear, with a 275/40/17 tire.
As I bought these many years ago, I have no idea who currently has the best deals.
No, there is nothing that needs recalibration. The fact that the wheels are larger makes no difference at all. What matters in this regard is overall tire diameter, which actually works out to be the same between the two stock tire sizes:
245/50/16: 25.65"
275/40/17: 25.66"
That 0.01" difference is not enough to matter.
Anyone have any idea where I can buy some aftermarket SS rims for these cars?
In the example above (both being 17x9.5"), the 38mm offset version would stick out further than the 56mm offset.
Like I posted above, the 17x9.5"/56mm offset will fit your 4th gen just fine with 275/40/17 tires, front and rear. Those same wheels/tires with a 38mm offset might scrub the wheel well (lip and/or inner section) up front when you turn the wheel.
In the example above (both being 17x9.5"), the 38mm offset version would stick out further than the 56mm offset.
The stock wheels that came on '98-'02 Camaro SS were 17x9" with a 50mm offset. I'm not sure if anyone still makes them in that size though. It seems like all the reproductions these days are based on the C4 Corvette sizing of 17x9.5" with a 56mm offset.
Like I posted above, the 17x9.5"/56mm offset will fit your 4th gen just fine with 275/40/17 tires, front and rear. Those same wheels/tires with a 38mm offset might scrub the wheel well (lip and/or inner section) up front when you turn the wheel.
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In the example above (both being 17x9.5"), the 38mm offset version would stick out further than the 56mm offset.
The stock wheels that came on '98-'02 Camaro SS were 17x9" with a 50mm offset. I'm not sure if anyone still makes them in that size though. It seems like all the reproductions these days are based on the C4 Corvette sizing of 17x9.5" with a 56mm offset.
Like I posted above, the 17x9.5"/56mm offset will fit your 4th gen just fine with 275/40/17 tires, front and rear. Those same wheels/tires with a 38mm offset might scrub the wheel well (lip and/or inner section) up front when you turn the wheel.
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17x9.5" with a 56mm offset is the most common size for reproduction ZR1 style wheels that fit 4th gen F-bodies and C4s.
If you measure a 9" wheel from inside the bead area it will be 9", but if you measure from lip to lip the measurement will show more like 9.5"-10".
Last edited by RPM WS6; Mar 23, 2013 at 10:54 AM.
Edit: I will be damn! I do have 17" X 9" . I took one off and looked at it. It clearly is marked 17X9JX50.0. All these years I thought that I had 9.5's. I now see what I thought was 17X9.5 was the 50.0 mm off-set. Who says you cant teach an old dawg new tricks?
Last edited by slow ride 02; Mar 23, 2013 at 04:58 PM.
Edit: I will be damn! I do have 17" X 9" . I took one off and looked at it. It clearly is marked 17X9JX50.0. All these years I thought that I had 9.5's. I know see what I thought was 17X9.5 was the 50.0 mm off-set. Who says you cant teach an old dawg new tricks?

I think a lot of people get confused by those markings. This isn't the first time that I've read someone mention that they thought the "50" marking somehow meant 17x9.50, rather than a 17x9" wheel with a 50mm offset.
Also, sometimes people measure the wheels wrong and go from lip to lip, which will measure about 0.5-1.0" wider than the rated wheel width. This can further add to the confusion over the true width.
Here are some pictures that I saved from another thread about this. These are factory original '96-'99 style, off a '99 SS but with '96 centercaps installed. As you can see in the first picture, they have the correct factory stamp on the front of the rim area between the spokes. In the second picture, you can see the 17x9 with 50mm offset markings, and in the final picture you can see the proper 9" width measurement as correctly taken between the beads:


I am looking at these:
http://www.factoryreproductions.com/...Chrome-c82.htm
Last edited by libertyforall1776; Jul 7, 2013 at 02:50 PM.
I am looking at these:
http://www.factoryreproductions.com/...Chrome-c82.htm
The 18" wheels would have to be lighter in weight.
The only benefit with those 18s is room for bigger brake rotors.
Last edited by libertyforall1776; Jul 7, 2013 at 09:19 PM. Reason: corrected recommended widest tire size
BTW the widest recommended for a 8.5" wide wheel is a 255.








