2018 ZL1 Camaro with 325/30/20

Markoz28 · 10-06-2019, 10:34 AM

So after a very long time I was able to fit a 325/30/20in the rear of my ZL1.
Long story but I’ll try to keep it short.

I ordered the BC Forged KL13 rims 20x10 (+20 OS) and 20x11.5 (+41 OS) in May, received them in late June. The OS for the rears were incorrect at +50 and pushing too far inboard. It didn’t matter how much I massaged the inner liner it was rubbing. After some discussion with the dealer and manufacturer the wheels were sent back and replaced with the correct size. Obviously this took a lot longer than expected but ultimately it was made right.

On the tires I went with 295/30/20 MPS4s and the rears 325/30/20 R888Rs.

So far no rubbing and the car looks amazing! Grip is outstanding as well.

If I had to do it again I would change the OS of the rear wheels to +43 so that there is no pole. I actually like the poke but some may not. Mind you this is with a 20x11.5 rim. You do not need to go this width for the 325 and could stay with the 11” width. I chose the 11.5” width more for astetics.

Over all I am very pleased! I hope I up loaded the pics right. Lol

Markoz28 · 10-06-2019, 10:37 AM

More pics

SienarSystems · 10-06-2019, 01:39 PM

Looks great!

Grumpy1 · 10-07-2019, 01:14 PM

Car looks great......
Explain a little more about the 11.5 rear for astetics, are you talking how the tire looks on that size wheel?

Markoz28 · 10-08-2019, 09:45 PM

Quote:

Originally Posted by Grumpy1

Car looks great......
Explain a little more about the 11.5 rear for astetics, are you talking how the tire looks on that size wheel?

Yep, I went with the 11.5 to give the tire more room on the rim without having to bulge. I would have just stayed with the 11” but got a great deal and couldn’t pass up for what I was looking for.

abbadon3718 · 11-23-2019, 12:41 PM

I thought anything above 305 in the rear would rub the fuel line. Is this not true or did you have to relocate at all?

L98 Z28 · 11-23-2019, 09:52 PM

In the pics, the rears tires do look bulged and wider than the rim. Not so apparent in person? Those are one of the rims I'm considering and they look good. Other than the initial (major pita) problems, sounds like you're happy with them. Curious about the fuel line too.

Markoz28 · 11-24-2019, 09:39 PM

I’m very happy with the end results. There really isn’t much bulg so it may just be the pic. I’m more than confident that the rim could take a 345 tire but that would have some bulg. The car couldn’t fit that tho from what I think.

You must relocate the wire harness on the drivers side. I also heated up the inner liner to push it in more. All this took about an hour and that is to take the liner off and then put it back on once done.

abbadon3718 · 11-26-2019, 01:16 AM

Right, wiring harness, I totally misremembered. Thanks for the info. Is your car standard height or lowered? I have the MRC with Eibach lowered about 1.1” and I’m wondering if I could get away with a similar setup. Congrats on the setup, bet you have monster grip now.

gomerboat · 01-13-2020, 06:08 PM

Can you give an update on how you feel about this combo after some miles now? R888R Noise, grip, wear, etc.?

I'm thinking about going with the same MPS4S/R888R combo.

Thanks!

Markoz28 · 01-13-2020, 09:07 PM

Quote:

Originally Posted by gomerboat

Can you give an update on how you feel about this combo after some miles now? R888R Noise, grip, wear, etc.?

I'm thinking about going with the same MPS4S/R888R combo.

Thanks!

No complaints at all. Id do it again in a heart beat. The tires are louder but does not bother me one bit. Grips amazing but only on dry ground. Would not use these tires on a daily.
I will be running this combo from now on.

gomerboat · 01-19-2020, 09:08 PM

Quote:

Originally Posted by Markoz28

No complaints at all. Id do it again in a heart beat. The tires are louder but does not bother me one bit. Grips amazing but only on dry ground. Would not use these tires on a daily.
I will be running this combo from now on.

Thanks! Ordering mine this week!

Markoz28 · 01-19-2020, 10:05 PM

Quote:

Originally Posted by gomerboat

Thanks! Ordering mine this week!

Details?

gomerboat · 01-20-2020, 07:48 AM

Quote:

Originally Posted by Markoz28

Details?

Going with MPS4S 285/30/20's up front and R888R 315/30/20 in the back. I see you did the 325, but I'll play it safe for this set. Guys making more power than me are using the 315, so we'll see how it goes.

10-06-2019, 10:34 AM	#1
Markoz28 Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018 Location: RGV Texas Posts: 1,527	2018 ZL1 Camaro with 325/30/20 So after a very long time I was able to fit a 325/30/20in the rear of my ZL1. Long story but I’ll try to keep it short. I ordered the BC Forged KL13 rims 20x10 (+20 OS) and 20x11.5 (+41 OS) in May, received them in late June. The OS for the rears were incorrect at +50 and pushing too far inboard. It didn’t matter how much I massaged the inner liner it was rubbing. After some discussion with the dealer and manufacturer the wheels were sent back and replaced with the correct size. Obviously this took a lot longer than expected but ultimately it was made right. On the tires I went with 295/30/20 MPS4s and the rears 325/30/20 R888Rs. So far no rubbing and the car looks amazing! Grip is outstanding as well. If I had to do it again I would change the OS of the rear wheels to +43 so that there is no pole. I actually like the poke but some may not. Mind you this is with a 20x11.5 rim. You do not need to go this width for the 325 and could stay with the 11” width. I chose the 11.5” width more for astetics. Over all I am very pleased! I hope I up loaded the pics right. Lol Attached Images

10-06-2019, 10:37 AM	#2
Markoz28 Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018 Location: RGV Texas Posts: 1,527	More pics Attached Images

11-23-2019, 12:41 PM	#6
abbadon3718 Drives: 2017 2SS Join Date: Jun 2019 Location: Las Vegas Posts: 102	Fuel line? I thought anything above 305 in the rear would rub the fuel line. Is this not true or did you have to relocate at all?

11-26-2019, 01:16 AM	#9
abbadon3718 Drives: 2017 2SS Join Date: Jun 2019 Location: Las Vegas Posts: 102	Ahhh Right, wiring harness, I totally misremembered. Thanks for the info. Is your car standard height or lowered? I have the MRC with Eibach lowered about 1.1” and I’m wondering if I could get away with a similar setup. Congrats on the setup, bet you have monster grip now.

10-06-2019, 01:39 PM	#3
SienarSystems Drives: ZL1 1LE Join Date: Oct 2018 Location: NYC (almost) Posts: 339	Looks great!

10-07-2019, 01:14 PM	#4
Grumpy1 Drives: 2018 ZL1 Hyper Blue A10 Join Date: Jan 2018 Location: Covington LA Posts: 646	Car looks great...... Explain a little more about the 11.5 rear for astetics, are you talking how the tire looks on that size wheel?

11-23-2019, 09:52 PM	#7
L98 Z28 Drives: 2017 ZL1 6spd Convertible NFG Join Date: Jan 2017 Location: Melbourne, FL Posts: 109	In the pics, the rears tires do look bulged and wider than the rim. Not so apparent in person? Those are one of the rims I'm considering and they look good. Other than the initial (major pita) problems, sounds like you're happy with them. Curious about the fuel line too.

11-24-2019, 09:39 PM	#8
Markoz28 Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018 Location: RGV Texas Posts: 1,527	I’m very happy with the end results. There really isn’t much bulg so it may just be the pic. I’m more than confident that the rim could take a 345 tire but that would have some bulg. The car couldn’t fit that tho from what I think. You must relocate the wire harness on the drivers side. I also heated up the inner liner to push it in more. All this took about an hour and that is to take the liner off and then put it back on once done.

01-13-2020, 06:08 PM	#10
gomerboat Drives: 2017 ZL1 Join Date: May 2018 Location: Phoenix, AZ Posts: 21	Can you give an update on how you feel about this combo after some miles now? R888R Noise, grip, wear, etc.? I'm thinking about going with the same MPS4S/R888R combo. Thanks!

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