Stock OFFSET - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Sir Nuke · 07-21-2009, 01:12 PM

Okay, I did the search, I read every thread to find the answer, and I can't believe that someone hasn't given the answer or done what I would have done to help a buddy out. How about SOMEONE, ANYONE, take off one of the stock front 20's and one of the stock rear 20's and find out the answer that so many people would like to know, WHAT IS THE OFFSET of the stock 20's. Thank you very very much. :{D

Mr Twisty · 07-21-2009, 03:41 PM

Some of the guys even have a set in their garage after getting wheel upgrades..... Lazy sunnybeaches

[edit] Here's what we have so far...

LS, LT 18x7.5 +38mm
opt. LT 19x8 +38mm
SS front 20x8 +35mm
SS rear 20x9 +40mm
opt. SS front 21x8.5 +35
opt.SS rear 21x9.5 +40

LS/RS is the same as SS/RS

all bolt patterns: 120x5xm14
Per GM Si document 2210980, lug nut torque is 100lbft or 140nm. <(thanks Pedders)

OUR72GTO · 07-21-2009, 06:01 PM

It is published as 40mm.

Mr Twisty · 07-21-2009, 06:57 PM

Quote:

Originally Posted by OUR72GTO

It is published as 40mm.

Can you verify it? I've also heard 35. The SS cars may also be different than the V6's.

Sir Nuke · 07-21-2009, 10:35 PM

I have heard that the fronts are +35 mm, and the rears are +40mm. so will SOMEONE make it official?

OUR72GTO · 07-21-2009, 11:29 PM

The 19's are 35 mm.

drivingincamaro · 07-21-2009, 11:52 PM

soo would a 38 offset fit?

Doc · 07-22-2009, 01:43 AM

Quote:

Originally Posted by drivingincamaro

soo would a 38 offset fit?

Depends on which car you have. Do you have an SS with Brembos? Offset is primarily for clearing the brakes. Clearance also depends on the style rim you've chosen. It's usually a bit risky unless you've done a test fit, to buy a rim with a smaller offset because it might just start touching the brake calipers. Going a few mm bigger usually is fine unless you go from like a 40 to a 50, then you might start having fender clearance problems with the tire.

Only way to be sure is to put a rim on your hub and see if it clears the brakes.

Mr Twisty · 07-22-2009, 07:02 PM

Offset is primarily for fender/inner well/strut rub.

I expect to see different offsets for different cars, ex: LS may be different that LT/RS, < may be different than SS, and fronts different than rears.

PQ · 07-22-2009, 08:15 PM

Quote:

Originally Posted by MisterCamaro69

Some of the guys even have a set in their garage after getting wheel upgrades..... Lazy sunnybeaches

Quote:

Originally Posted by Sir Nuke

I have heard that the fronts are +35 mm, and the rears are +40mm. so will SOMEONE make it official?

WAIT.

I have a set of 20" MSs sitting in my garage. What the hell is an offset? and how do I measure it for you. I'll do it when I get home in about 30 minutes. PM me to tell me you got this post.

*CamaroSpike23* · 07-22-2009, 08:19 PM

Quote:

Originally Posted by irpq11

WAIT.

I have a set of 20" MSs sitting in my garage. What the hell is an offset? and how do I measure it for you. I'll do it when I get home in about 30 minutes. PM me to tell me you got this post.

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

PQ · 07-22-2009, 08:23 PM

Quote:

Originally Posted by CamaroSpike23

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

Ok, so when I measure it, how can i be accurate as far as where the center is on the inside?

I guess just measure the center distance and then eyeball it level from the inside. It slopes so won't be perfectly accurate.

PQ · 07-22-2009, 08:24 PM

Oh. I will lay it on the ground and measure from the floor.

Should work.

Mr Twisty · 07-22-2009, 08:37 PM

Quote:

Originally Posted by irpq11

Oh. I will lay it on the ground and measure from the floor.

Should work.

That will be off slightly... Best way is with a straight-edge touching just the inner rim, not the sidewall, and measure to the inside of the hub.

Or, It should be stamped on the wheel someplace.

Look for something similar to this...

07-21-2009, 01:12 PM	#1
Sir Nuke Master of All Things Drives: '20 Corvette Stingray Join Date: Jul 2009 Location: Southeast of Houston, Texas Posts: 22,330 View My Garage	Stock OFFSET Okay, I did the search, I read every thread to find the answer, and I can't believe that someone hasn't given the answer or done what I would have done to help a buddy out. How about SOMEONE, ANYONE, take off one of the stock front 20's and one of the stock rear 20's and find out the answer that so many people would like to know, WHAT IS THE OFFSET of the stock 20's. Thank you very very much. :{D __________________

07-21-2009, 03:41 PM	#2
Mr Twisty Drives: the 2nd amendment home Join Date: May 2008 Location: OK Posts: 14,707	Some of the guys even have a set in their garage after getting wheel upgrades..... Lazy sunnybeaches [edit] Here's what we have so far... LS, LT 18x7.5 +38mm opt. LT 19x8 +38mm SS front 20x8 +35mm SS rear 20x9 +40mm opt. SS front 21x8.5 +35 opt.SS rear 21x9.5 +40 LS/RS is the same as SS/RS all bolt patterns: 120x5xm14 Per GM Si document 2210980, lug nut torque is 100lbft or 140nm. <(thanks Pedders) __________________ "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin Last edited by Mr Twisty; 07-24-2009 at 11:24 AM.

07-21-2009, 06:01 PM	#3
OUR72GTO 2010 SIM Beige RS 6M Drives: SIM RS 6M 66 Corvair Silverado LTZ Join Date: Oct 2008 Location: Kamloops,British Columbia Posts: 4,677	It is published as 40mm. __________________ CAMARO.. 2010 The Heart Beat is back in CHEVROLET Now let's put it back in America

07-21-2009, 10:35 PM	#5
Sir Nuke Master of All Things Drives: '20 Corvette Stingray Join Date: Jul 2009 Location: Southeast of Houston, Texas Posts: 22,330 View My Garage	I have heard that the fronts are +35 mm, and the rears are +40mm. so will SOMEONE make it official? __________________

07-21-2009, 11:29 PM	#6
OUR72GTO 2010 SIM Beige RS 6M Drives: SIM RS 6M 66 Corvair Silverado LTZ Join Date: Oct 2008 Location: Kamloops,British Columbia Posts: 4,677	The 19's are 35 mm. __________________ CAMARO.. 2010 The Heart Beat is back in CHEVROLET Now let's put it back in America

07-21-2009, 11:52 PM	#7
drivingincamaro Drives: 95 civic Join Date: Apr 2008 Location: Chicago Illinois Posts: 5,796	soo would a 38 offset fit? __________________

07-22-2009, 07:02 PM	#9
Mr Twisty Drives: the 2nd amendment home Join Date: May 2008 Location: OK Posts: 14,707	Offset is primarily for fender/inner well/strut rub. I expect to see different offsets for different cars, ex: LS may be different that LT/RS, < may be different than SS, and fronts different than rears. __________________ "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin Last edited by Mr Twisty; 07-23-2009 at 06:25 PM.

07-22-2009, 08:24 PM	#13
PQ Booooosted. Drives: 2010 Supercharged SS Join Date: Apr 2008 Location: Mobile, AL Posts: 36,716 View My Garage	Oh. I will lay it on the ground and measure from the floor. Should work. __________________

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