vmaquera

What is the difference between ZR-1 and GS wheel offsets?

Z51JEFF

GS wheel is 50MM,Z wheel is 36MM.Ask me how I knowThere,now Im only stupid in one post.To use OEM A-Molds you need to do some work to get them to fit correctly but the way I see it,you can have fakes or you can have the real deal.

WVZR-1

How do you know?

FACT: Difference? 14mm

ZR-1 production 17 X 11 wheel offset is +36mm!

GS production 17 X 11 wheel offset is +50mm!

Documentation is "all-over" the place and I'll leave it at that! Jeff knows all to well after struggling with spacers to correctly mount GS wheels on his ZR-1!

Changed my mind here's a couple links:

Wheel: http://www.corvetteactioncenter.com/...usp_chart.html

Offset explained simply: http://www.tirerack.com/wheels/tech/...jsp?techid=101

vmaquera

Thanks.

I am looking to get an extra set of wheels for my Z.

Thanks.

Triple White 92

I would like to find an extra set of wheels also. I would prefer used wheels and this seems to be a difficult challenge due the the ZR-1 rear wheel offset. Ebay has tons of ZR-1 wheels but most of them have the GS (50mm offset). I love the look of Fikse wheels but I have yet to find a set of used wheels like these. Black chrome ZR-1 after market wheels look great, but not sure how they would look with Admiral Blue. The search continues..........

Mike Boggs
94 AB/Black ZR-1
97 C5 coupe
92 C4 convert.

Dandy97

I purchased a set of A-molds in black from Factory Reproductions with the correct ZR-1 offsets. The price is good and the wheels I received are very nice quality. They also have chrome and silver.

Z51JEFF

Something like that.

vmaquera

What are the front wheel offsets?

WVZR-1

Fronts are just +56mm but all of that information is in the first link I posted. Check the link and do some research on your own to satisfy yourself of the results and then just shop! It really seems your not "prepared" yet and there's substantially more you can learn "searching on your own" and then returning with more direct questions!

There are wheel builders that build "close" to factory offsets and it's relatively easy to determine the fit yourself. If you've found a particular wheel you like get the specs from the builder and post the wheel model and the specs passed on to you by the builder. Likely someone has/had the set-up and can offer assistance regarding the fit.

There's not really a "generalization" that can be tossed out there regarding wheels.

vmaquera

Thanks.

The chart from the Corvette Action Center is great !

I have read the Tire-rack explanation of offset before, but like a lot of technical things, I often have to reread stuff.

Thanks......

hiznhrz

If you replace your 17X10 (36mm) offset ZR1 wheels with 17X10 (50mm offset) Grand Sport wheels you will lose 14mm's of clearance on the inside of the rim and the outside edge will of the wheel will retract 14mm into the wheel well.

14mm is .55" or a little more than 1/2 of an inch.

Z51JEFF

If you want OEM GS wheels you have to use spacers and longer wheel studs.Ive got the spacers as well as the longer studs,haven't had a chance to get them on the car yet.Like I said,it is a job to get them to fit right but how many people have OEM GS wheels on there cars?The spacers were $170 and the longer wheel studs were $ 20 I think.WVZR1 got me the info on the spacers and studs...............Thanks Dave.

Aurora40

At least 1,000...

WVZR-1

Yep + a couple!

I've got a set for "the shelf"!!

Z51JEFF

Heres a picture of the wheels spacers for the GS wheels on a ZR-1.[IMG][/IMG]

-=Jeff=-

I just got done replacing my Wheel bearings..
I added the longer studs and 20mm Spacer for my GS wheels (aftermarket) but still 50mm Offset.. I need to get some pictures

67redster

I have a set of aftermarket GS offset wheels I would like to put on my 95 ZR-1 during winter storage. Do you think that they will fit for that purpose or are the studs too short to hold?

thanks

Z51JEFF

I think the aftermarket wheels are built to ZR-1 specs,but could be wrong.

Trizney

Yes, the GS wheels will work for storing.

The wheel studs are just fine in length.

Aurora40

I believe the wheels fit fine in terms of not rubbing, it's just they look pretty dumb as they are sunk in the wheelwell. Though I've never run GS offset wheels, so it's a guess.