FREE wheel offsets! - Page 7 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

GilmaRS · 08-20-2014, 10:50 PM

Sooo I'm thinking about ordering custom wheels for my car what would be a SAFE offset to go with ?

Norm Peterson · 08-21-2014, 06:53 AM

That's going to depend a lot on the wheel width you want.

The easiest approach to "safe" would be to use the same offsets Chevy uses for wheels of the same width. Right now, your RS package has 20 x 8 x ET+35 (front) and 20 x 9 x ET+40 (rear) (http://www.camaro5.com/forums/wiki.p...WHEELS___TIRES) .

Supposedly the 1LE/ZL1 uses 20 x 10 x ET+37 (front) and 20 x 11 x ET+23 (rear). I don't think that there are any significant dimensional differences between 1LE and LS/LT/SS struts that could force you to use different offset 10" front wheels (but it might be worth checking into).

You should be able to interpolate between those numbers for wheel widths in between and still be "safe".

Don't be afraid to knock that upper corner off the knuckle if an interference is created there. See earlier in this thread.

Late note to SUX2BU - I agree that backspacing is easier for most people to work with for avoiding interferences on the strut side. But as a number by itself it's not very helpful for the sheetmetal side, or for the people who are specifically shooting for a "flush" appearance. You'd still have to go through some math to get from backspacing to front side spacing . . . and then compare that to an OE wheel that you have to do the same math for.

Norm

IneedAZ · 08-21-2014, 07:54 AM

Also, keep in mind some of the offsets that work for some wont work for others if the wheel has spokes that curve back. My Asanti rims in the rear are 20x10 and are 20offset. I might have been go a little more, but not much cause the spokes curve back too close to the calipers. Had i gone with a straight spoke rim i would have not had an issue. So now, my 295/35 20 PSS tires stick out about an inch.

Norm Peterson · 08-21-2014, 08:16 AM

Brembo calipers vs spoke clearance is a known problem area when it comes to fitting aftermarket wheels. As a matter of fact only half an hour or so ago this exact topic came up in conversation with one of the parts counter guys I deal with for my car (in reference to another customer looking to fit Brembo brakes to a car being built to show).

Norm

IneedAZ · 08-21-2014, 08:19 AM

I told my wife i blame her cause she liked the spokes that curve back instead of straight

copperhead2959 · 02-09-2018, 10:14 PM

Been trying to get some input on this but didn't get any hits.(resurrection commence. Lol). I'm looking to run an 18x9.5 setup with a +30 offset and 295/45 on all four corners. Has anyone done this or know if it would fit? Any help is appreciated

IASS · 03-06-2019, 03:48 PM

Shoutout to SUX2BU just used this as a guide and used a calculator to verify fitment.
just got my setup mounted and balanced today!

18x8.5 fronts with a 255/55R18 and 18x10 rears with a 305/45r18

Coleroad · 02-21-2020, 11:27 AM

This is really a great thread, should’ve been a sticky IMO.

racesloth · 05-28-2020, 11:45 AM

Quote:

Originally Posted by IASS

Shoutout to SUX2BU just used this as a guide and used a calculator to verify fitment.
just got my setup mounted and balanced today!

18x8.5 fronts with a 255/55R18 and 18x10 rears with a 305/45r18

Thatlooks great!

08-20-2014, 10:50 PM	#85
GilmaRS Drives: 2014 Camaro 1LT-RS Join Date: Aug 2014 Location: Dallas, Texas Posts: 1	Newbie Sooo I'm thinking about ordering custom wheels for my car what would be a SAFE offset to go with ?

08-21-2014, 07:54 AM	#87
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,110 View My Garage	Also, keep in mind some of the offsets that work for some wont work for others if the wheel has spokes that curve back. My Asanti rims in the rear are 20x10 and are 20offset. I might have been go a little more, but not much cause the spokes curve back too close to the calipers. Had i gone with a straight spoke rim i would have not had an issue. So now, my 295/35 20 PSS tires stick out about an inch. __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

08-21-2014, 08:19 AM	#89
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,110 View My Garage	I told my wife i blame her cause she liked the spokes that curve back instead of straight __________________ Sold 2012 2LT RS 12.3@112 old setup Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS. 2017 HyperBlue ZL1 A10 Born 3/17/17Delivered 4/08/17 2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. 807hp/762tq on 93 gas and 848hp/792tq on e47 Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver Daily Driver 2021 BMW M340i Xdrive

03-06-2019, 03:48 PM	#91
IASS Drives: 2014 ss Join Date: Dec 2017 Location: IA Posts: 149	Shoutout to SUX2BU just used this as a guide and used a calculator to verify fitment. just got my setup mounted and balanced today! 18x8.5 fronts with a 255/55R18 and 18x10 rears with a 305/45r18 Attached Images

08-21-2014, 06:53 AM	#86
Norm Peterson corner barstool sitter Drives: 08 Mustang GT, 19 WRX Join Date: Jul 2012 Location: Eastern Time Zone Posts: 6,990	That's going to depend a lot on the wheel width you want. The easiest approach to "safe" would be to use the same offsets Chevy uses for wheels of the same width. Right now, your RS package has 20 x 8 x ET+35 (front) and 20 x 9 x ET+40 (rear) (http://www.camaro5.com/forums/wiki.p...WHEELS___TIRES) . Supposedly the 1LE/ZL1 uses 20 x 10 x ET+37 (front) and 20 x 11 x ET+23 (rear). I don't think that there are any significant dimensional differences between 1LE and LS/LT/SS struts that could force you to use different offset 10" front wheels (but it might be worth checking into). You should be able to interpolate between those numbers for wheel widths in between and still be "safe". Don't be afraid to knock that upper corner off the knuckle if an interference is created there. See earlier in this thread. Late note to SUX2BU - I agree that backspacing is easier for most people to work with for avoiding interferences on the strut side. But as a number by itself it's not very helpful for the sheetmetal side, or for the people who are specifically shooting for a "flush" appearance. You'd still have to go through some math to get from backspacing to front side spacing . . . and then compare that to an OE wheel that you have to do the same math for. Norm

08-21-2014, 08:16 AM	#88
Norm Peterson corner barstool sitter Drives: 08 Mustang GT, 19 WRX Join Date: Jul 2012 Location: Eastern Time Zone Posts: 6,990	Brembo calipers vs spoke clearance is a known problem area when it comes to fitting aftermarket wheels. As a matter of fact only half an hour or so ago this exact topic came up in conversation with one of the parts counter guys I deal with for my car (in reference to another customer looking to fit Brembo brakes to a car being built to show). Norm

02-09-2018, 10:14 PM	#90
copperhead2959 Drives: 2015 camaro 2SS Join Date: Nov 2017 Location: Shaw afb, SC Posts: 62	Been trying to get some input on this but didn't get any hits.(resurrection commence. Lol). I'm looking to run an 18x9.5 setup with a +30 offset and 295/45 on all four corners. Has anyone done this or know if it would fit? Any help is appreciated

02-21-2020, 11:27 AM	#92
Coleroad Drives: 13 Camaro Join Date: Oct 2016 Location: Colorado Posts: 315	This is really a great thread, should’ve been a sticky IMO.