Wheel/Offset Question
Thread Starter
Burning Brakes
Joined: May 2002
Posts: 1,143
Likes: 5
From: CASTLE ROCK CO
Wheel/Offset Question
Located a set of 87 GM vette wheels for my 87. Want to try the polishing route on a set while keeping my stock wheels on.
Now a guys got 87 wheels(16x9.5) mine are stock 16x8.5. I looked up in http://www.vettenet.org for the specs. Seems STD suspension(FE1) have 8.5's with 32 offset. The 9.5's were Z51 and Z52 suspension with an offset of 38.
So now we seem to have 4mm more offset on the 9.5's
Since I can't figure out how to make sense out of all this crap.
Am I going to have any problems going to the 9.5's?
Why would I want to go to a 9.5? Traction? Wear? Cornering?
Will I need a frt/rear alignment?
Any help or answers would be appreciated. :confused:
Now a guys got 87 wheels(16x9.5) mine are stock 16x8.5. I looked up in http://www.vettenet.org for the specs. Seems STD suspension(FE1) have 8.5's with 32 offset. The 9.5's were Z51 and Z52 suspension with an offset of 38.
So now we seem to have 4mm more offset on the 9.5's
Since I can't figure out how to make sense out of all this crap.
Am I going to have any problems going to the 9.5's?
Why would I want to go to a 9.5? Traction? Wear? Cornering?
Will I need a frt/rear alignment?
Any help or answers would be appreciated. :confused:
Team Owner
Joined: Sep 2001
Posts: 62,137
Likes: 1,727
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Wheel/Offset Question (OleDog)
:confused:
i thought all 84-87s had 38mm offset
But if there is a difference, you shouldnt have any problem at all getting them to fit.
i thought all 84-87s had 38mm offset
But if there is a difference, you shouldnt have any problem at all getting them to fit.
Melting Slicks
Joined: Sep 2000
Posts: 3,099
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From: PITTSBURGH PA
Cruise-In IV Veteran
Cruise-In V Veteran
Re: Wheel/Offset Question (vader86)
the 9.5s are supposed to be better for handeling maybe for traction because you might strech more foot print on the ground :cheers:
Melting Slicks
Joined: Mar 2001
Posts: 2,149
Likes: 303
From: Timra, Sweden
Re: Wheel/Offset Question (OleDog)
Here you have some data:
http://w1.601.telia.com/~u60113743/corvette_wheels/
The 9.5" wide wheels have 6 mm more offset and they are 25 mm ( 1" ) wider.
That means that they will add 18.5 mm inward but only 6.5 mm outward.
The reson for adding more inward is to keep the wheel in the right place compared to the body.
The wider rim will fit just fine and you don't need an alignment after the change. The stock tire size is also the same on both rims, but on the wider rim you can use a wider tire if you want to.
http://w1.601.telia.com/~u60113743/corvette_wheels/
The 9.5" wide wheels have 6 mm more offset and they are 25 mm ( 1" ) wider.
That means that they will add 18.5 mm inward but only 6.5 mm outward.
The reson for adding more inward is to keep the wheel in the right place compared to the body.
The wider rim will fit just fine and you don't need an alignment after the change. The stock tire size is also the same on both rims, but on the wider rim you can use a wider tire if you want to.
Melting Slicks
Joined: Mar 2001
Posts: 2,149
Likes: 303
From: Timra, Sweden
Re: Wheel/Offset Question (nobodyunknown)
1984 base has 8.5" front and 8.5" rear
1984 z51 has 8.5" front and 9.5" rear
1985-1987 base has 8.5" front and 8.5" rear
1985-1987 z51 has 9.5" front and 9.5" rear
1984 z51 has 8.5" front and 9.5" rear
1985-1987 base has 8.5" front and 8.5" rear
1985-1987 z51 has 9.5" front and 9.5" rear
