01-10-2019, 05:32 PM | #1 |
Yee-aay-ee!
Drives: 2015 2SS/RS CV CE Join Date: Nov 2015
Location: ORegon
Posts: 2,520
|
Suspension vs Wheel Size & Offset
I'm wondering if a Camaro 2.0T with 18x8.5 32mm offset wheels from the factory and a Camaro 2.0T with 20x8.5 25mm offset wheels from the factory have identical or different suspension setups?
__________________
|
01-11-2019, 03:10 PM | #2 |
Drives: 2017 1SS 1LE Join Date: Jun 2016
Location: Detroit, MI
Posts: 1,001
|
Yes, they should both have identical suspensions (FE2 RPO code). Only time a 2.0T camaro would have different suspension is if it's a 1LE.
__________________
2017 SS 1LE.
|
01-11-2019, 06:53 PM | #3 |
Yee-aay-ee!
Drives: 2015 2SS/RS CV CE Join Date: Nov 2015
Location: ORegon
Posts: 2,520
|
I don't understand the reason that the 18" and 20" offsets are different, when the width of the wheels are the same? I thought the diameter is unrelated to the offset.
__________________
|
01-11-2019, 08:39 PM | #4 |
Drives: 2017 Camaro 1SS M6 Join Date: Apr 2015
Location: Indy
Posts: 2,460
|
The offset is independent of the diameter. The lower offset (given the same width) will push the wheels out further for a more aggressive stance.
__________________
2017 Camaro 1SS, M6, Hurst shifter, Hyper Blue, NPP, Gray Split Spoke Wheels
Best 1/4 Mile: 12.24 @ 115.9 mph |
01-11-2019, 08:54 PM | #5 |
Yee-aay-ee!
Drives: 2015 2SS/RS CV CE Join Date: Nov 2015
Location: ORegon
Posts: 2,520
|
I understand, so from a performance aspect, is the higher offset (if the diameters were equal) better because it brings the wheels in?
__________________
|
01-11-2019, 11:22 PM | #6 |
Drives: 2018 Hyper Blue 2SS 1LE Join Date: Aug 2018
Location: Dessert
Posts: 486
|
To figure out why the offset is different, you need to look at the OD of the 18" and 20" setup. If they are the same OD the offset would be the same for both. But if the OD is different, the change in offset will help maintain the desired scrub radius.
__________________
2018 Hyper Blue Metallic 2SS 1LE with Nav, PDR, and track alignment
1:34.20 Willow Springs Big Track |
01-11-2019, 11:50 PM | #7 |
Yee-aay-ee!
Drives: 2015 2SS/RS CV CE Join Date: Nov 2015
Location: ORegon
Posts: 2,520
|
If wheel diameter doesn't affect offset, why does tire diameter affect it? Is it a matter of clearance?
__________________
|
01-13-2019, 10:38 AM | #8 | ||
Drives: 2017 Camaro 1SS M6 Join Date: Apr 2015
Location: Indy
Posts: 2,460
|
Quote:
Quote:
The 20" setup's tires (245/40-20) have an OD of 27.7165", or about 0.07" different from the 18" setup. That's pretty close.
__________________
2017 Camaro 1SS, M6, Hurst shifter, Hyper Blue, NPP, Gray Split Spoke Wheels
Best 1/4 Mile: 12.24 @ 115.9 mph |
||
01-14-2019, 09:12 AM | #9 |
Drives: 2017 1SS 1LE Join Date: Jun 2016
Location: Detroit, MI
Posts: 1,001
|
It could possibly be a brake clearance thing? 20s are meant to fit the SS package with the 4-piston Brembos, and I'd assume that brake package requires more room than the base floating caliper on the LTs.
__________________
2017 SS 1LE.
|
01-14-2019, 01:52 PM | #10 |
SABIO
Drives: 2016 CAMARO 1SS Join Date: Jul 2015
Location: Bradford, ON
Posts: 5,012
|
Wheels pushed out more just look better.
GM wants to give you a reason to upgrade your wheels when you buy the car.
__________________
|
01-14-2019, 07:45 PM | #11 |
Yee-aay-ee!
Drives: 2015 2SS/RS CV CE Join Date: Nov 2015
Location: ORegon
Posts: 2,520
|
Yes, it makes sense, but unfortunately it affects the scrub radius.
__________________
|
01-17-2019, 02:54 AM | #12 |
Drives: '16 2SS GD1 MX0 NPP F55 IO6 Join Date: Jun 2013
Location: Florida
Posts: 1,298
|
If you want the outside face of the wheel to stay in the same spot when you go to a wider or thinner wheel, the offset must change to keep the mounting interface at the same place with the hub face.
Pretend this is the top down view of your front left wheel and you want to keep the outside (left) edge of either wheel flush with the fender. |----i------| |----i----| On the thinner wheel the offset is 0 (middle), but to keep that front left wheel at the same outer position, the wider wheel needs to move the offset away from the middle. |
01-17-2019, 08:07 AM | #13 | |
Yee-aay-ee!
Drives: 2015 2SS/RS CV CE Join Date: Nov 2015
Location: ORegon
Posts: 2,520
|
Quote:
__________________
|
|
|
|
Post Reply
|
|
|