2019 ZL1.... rear 305/35/20 Nitto 555r?

jmackisback · 08-24-2019, 08:03 PM

As the title implies, I am wondering what the side effects of putting 305/35/20 Nitto 555r's on my 2019 ZL1 would be? I've read many threads but not come up with a clear answer. The only reason I want to put these on is because I have virtually new ones left over from my brief stint owning a Hellcat. Rubbing maybe? I don't really care about the speedo being out a couple MPH.

Thanks in advance for any input.

*Joshinator99* · 08-24-2019, 09:47 PM

Quote:

Originally Posted by jmackisback

As the title implies, I am wondering what the side effects of putting 305/35/20 Nitto 555r's on my 2019 ZL1 would be? I've read many threads but not come up with a clear answer. The only reason I want to put these on is because I have virtually new ones left over from my brief stint owning a Hellcat. Rubbing maybe? I don't really care about the speedo being out a couple MPH.

Thanks in advance for any input.

There’s a few of us running those rear tires on our stock SS wheels, so you definitely won’t have any problems on a ZL1.

TEST DRyVer · 08-25-2019, 03:03 AM

Quote:

Originally Posted by jmackisback

As the title implies, I am wondering what the side effects of putting 305/35/20 Nitto 555r's on my 2019 ZL1 would be? I've read many threads but not come up with a clear answer. The only reason I want to put these on is because I have virtually new ones left over from my brief stint owning a Hellcat. Rubbing maybe? I don't really care about the speedo being out a couple MPH.

Thanks in advance for any input.

I have asked 2 different wheel companies/distributors the same question. I was looking to run 285/35/20 in the front and 305/35/20 in the back for my ZL1. Both recommended against it... They stated the likelihood of rubbing on the inner wheel well plastics and wiring harness. Both recommended mild modifications in order to run a slightly higher series tire. Of course I've also read a couple of posts of people running them without problems. Some also believe that minimal rubbing is ok. I can tell you from a driving standpoint, rubbing of any kind ruins the handling dynamics of any car (with maybe the exception of mild rubbing at low speeds, when the wheel is locked in any given direction).
Anyway, for me, I just wanted more sidewall as I like a meatier tire. I will be taking their advice and not going to higher profile tires on 20's. However, it is making me consider running a different wheel with 285/35/19 in the front and 305/35/19 in the back. If I drop a wheel size, I can reduce weight, have increased ride quality, and run the higher profile tires that will likely result in slightly increased performance. I would be giving up the great 20' look on our cars...

jmackisback · 08-25-2019, 09:55 AM

Thanks for the input guys. Seems like the information is still conflicting.....hmmm

*Joshinator99* · 08-25-2019, 12:04 PM

Quote:

Originally Posted by jmackisback

Thanks for the input guys. Seems like the information is still conflicting.....hmmm

Not really...lol. KingLT1 has a good thread about it too.

jmackisback · 08-25-2019, 04:56 PM

Quote:

Originally Posted by Joshinator99

Not really...lol. KingLT1 has a good thread about it too.

So to clarify, you didn't have rubbing or issues with the wiring harness? For everyone who says they didn't, there is a person who says they did. Do ZL1s sit lower? What about the magride option?

F419sr1 · 08-25-2019, 05:14 PM

Quote:

Originally Posted by jmackisback

So to clarify, you didn't have rubbing or issues with the wiring harness? For everyone who says they didn't, there is a person who says they did. Do ZL1s sit lower? What about the magride option?

On a M6 no rubbing. On the A10 the harness is there and will run through

*Joshinator99* · 08-25-2019, 06:04 PM

Quote:

Originally Posted by jmackisback

So to clarify, you didn't have rubbing or issues with the wiring harness? For everyone who says they didn't, there is a person who says they did. Do ZL1s sit lower? What about the magride option?

No rubbing on either side. I proactively moved the driver’s side harness before putting the new tires on just to be safe. Takes about 4 minutes to move it over. Took me longer to find my bag of zip ties.

jmackisback · 08-25-2019, 08:29 PM

Thanks, I feel better about putting these on now. I will move the harness as a precautionary measure.

*Joshinator99* · 08-25-2019, 08:52 PM

Quote:

Originally Posted by jmackisback

Thanks, I feel better about putting these on now. I will move the harness as a precautionary measure.

No worries. Check out this thread too: https://www.camaro6.com/forums/showthread.php?t=541363

KingLT1 · 08-26-2019, 04:57 PM

Josh is spot on. These tires are one of the best upgrades you can do to the car.

DD goat · 08-26-2019, 06:09 PM

First of all, the harness you speak of on the drives side rear is on M6 cars also.
You'll have potential problems in the FRONT with the 285 35 20. Cars with mag ride (ZL1) don't like the clearance of the 35's in front

jmackisback · 08-28-2019, 09:54 AM

Quote:

Originally Posted by DD goat

First of all, the harness you speak of on the drives side rear is on M6 cars also.
You'll have potential problems in the FRONT with the 285 35 20. Cars with mag ride (ZL1) don't like the clearance of the 35's in front

Good information. Luckily I only want to put my old Hellcat 35s on the back.

Aaronlunada@gmail.com · 12-26-2025, 08:26 PM

I just put 305/35R20 Mickey Thompson ET on my rear 2023 ZL1 and they rubbed on the driver side inside fender. Something hard behind the wall. No go for stock wheels

08-24-2019, 08:03 PM	#1
jmackisback Drives: 2019 Camaro ZL1 Join Date: May 2017 Location: Vancouver Posts: 154	2019 ZL1.... rear 305/35/20 Nitto 555r? As the title implies, I am wondering what the side effects of putting 305/35/20 Nitto 555r's on my 2019 ZL1 would be? I've read many threads but not come up with a clear answer. The only reason I want to put these on is because I have virtually new ones left over from my brief stint owning a Hellcat. Rubbing maybe? I don't really care about the speedo being out a couple MPH. Thanks in advance for any input. __________________ 1987 Camaro V6 1988 Camaro IROC Z 1993 Camaro Z28 1999 Camaro SS 2017 Camaro SS

08-25-2019, 09:55 AM	#4
jmackisback Drives: 2019 Camaro ZL1 Join Date: May 2017 Location: Vancouver Posts: 154	Thanks for the input guys. Seems like the information is still conflicting.....hmmm __________________ 1987 Camaro V6 1988 Camaro IROC Z 1993 Camaro Z28 1999 Camaro SS 2017 Camaro SS

08-25-2019, 08:29 PM	#9
jmackisback Drives: 2019 Camaro ZL1 Join Date: May 2017 Location: Vancouver Posts: 154	Thanks, I feel better about putting these on now. I will move the harness as a precautionary measure. __________________ 1987 Camaro V6 1988 Camaro IROC Z 1993 Camaro Z28 1999 Camaro SS 2017 Camaro SS

08-26-2019, 04:57 PM	#11
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,561	Josh is spot on. These tires are one of the best upgrades you can do to the car. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

08-26-2019, 06:09 PM	#12
DD goat Drives: 2017 Hyper Blue Camaro 2SS Join Date: Aug 2016 Location: Grayling Michigan Posts: 94	First of all, the harness you speak of on the drives side rear is on M6 cars also. You'll have potential problems in the FRONT with the 285 35 20. Cars with mag ride (ZL1) don't like the clearance of the 35's in front __________________

12-26-2025, 08:26 PM	#14
Aaronlunada@gmail.com Drives: Chevrolet Camaro Join Date: Aug 2022 Location: NV Posts: 6	I just put 305/35R20 Mickey Thompson ET on my rear 2023 ZL1 and they rubbed on the driver side inside fender. Something hard behind the wall. No go for stock wheels

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