Help possible tire issue?

babigguy · 05-26-2023, 08:01 PM

2017 Zl1 changed the rear tires to 305/35/20 and went for a drive and got a service rear diff and a p300 code not sure if it’s related or not. I see some info about 3% height difference what size do I need on the front to correct this?? Or do I have more than one issue

arpad_m · 05-26-2023, 09:35 PM

Go change the fronts to 35 AR as well, or revert to 305/30/20s in the rear (that's probably what I'd do if I had a choice, your tires will be very tall otherwise).

babigguy · 05-28-2023, 06:17 AM

Will 285/35 fit the front?

laynlo15 · 05-28-2023, 06:26 AM

I run a 305 35 20 Nitto 555 R2 on the rear and a 245 40 20 on the front. You need to be somewhere around 27.5 tall. I'd run a 275 35 20 up front, 27.6 tall.

babigguy · 05-28-2023, 06:55 AM

Quote:

Originally Posted by laynlo15

I run a 305 35 20 Nitto 555 R2 on the rear and a 245 40 20 on the front. You need to be somewhere around 27.5 tall. I'd run a 275 35 20 up front, 27.6 tall.

Ok that’s what I went to for more sidewall running at 776 rwhp so wanted more sidewall what tire are you running in the front??

arpad_m · 05-28-2023, 12:24 PM

Quote:

Originally Posted by babigguy

Will 285/35 fit the front?

Quote:

Originally Posted by babigguy

Ok that’s what I went to for more sidewall running at 776 rwhp so wanted more sidewall what tire are you running in the front??

285/35/20 will fit, but barely and you may have rubbing issues at full lock. If you want to change the fronts to bring the car back to normal, I'd side with the recommendation above for 275/35/20, that'll fix your problem and leave at least some "breathing room" between the tire and the wheel liner.

WhiteMale · 05-28-2023, 05:44 PM

I think people runna 305/35 without these problems, sure you didnt rub through the harness back there and your throwing codes?

laynlo15 · 05-28-2023, 06:05 PM

Quote:

Originally Posted by WhiteMale

I think people runna 305/35 without these problems, sure you didnt rub through the harness back there and your throwing codes?

Huh?

babigguy · 05-28-2023, 07:28 PM

Quote:

Originally Posted by WhiteMale

I think people runna 305/35 without these problems, sure you didnt rub through the harness back there and your throwing codes?

Yea moved it before and rechecked it all good

laynlo15 · 05-28-2023, 08:25 PM

Quote:

Originally Posted by babigguy

Yea moved it before and rechecked it all good

If somebody has had an alignment and the caster is off and moved to tire to far forward they could rub, but if your tire is center in the middle of the fender well you should be fine.

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babigguy · 06-10-2023, 07:40 PM

So went with the 275/35/20’s and codes cleared thanks for the help!!!

05-26-2023, 08:01 PM	#1
babigguy Drives: 2017 ZL1, 2015 Z51 vette 2005 gto Join Date: Sep 2009 Location: New Castle,pa Posts: 252	Help possible tire issue? 2017 Zl1 changed the rear tires to 305/35/20 and went for a drive and got a service rear diff and a p300 code not sure if it’s related or not. I see some info about 3% height difference what size do I need on the front to correct this?? Or do I have more than one issue __________________ Last edited by babigguy; 05-26-2023 at 08:09 PM. Reason: Mistake

05-26-2023, 09:35 PM	#2
arpad_m Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017 Location: East Tennessee Posts: 11,582 View My Garage	Go change the fronts to 35 AR as well, or revert to 305/30/20s in the rear (that's probably what I'd do if I had a choice, your tires will be very tall otherwise). Attached Images __________________ 2018 Camaro 2SS — G7E MX0 NPP F55 IO6 735 rwhp \| 665 rwtq Magnuson TVS 2300 80mm pulley \| Kooks 1 7/8" LT headers \| JRE smooth idle terminator cam \| LT4 FS & injectors \| TSP forged pistons & rods JMS PowerMAX \| DSX flex fuel kit \| Roto-Fab CAI \| Soler 95mm LT5 TB \| 1LE wheels \| 1LE brakes \| BMR rear cradle lockout \| JRE custom tune 1100 - 1/30/18 \| 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 \| 3800 - 2/26/18 4300 - 2/27/18 \| 4B00 - 3/01/18 4200 - 3/05/18 \| 4800 - 3/14/18 5000 - 3/16/18 \| 6000 - 3/19/18

05-28-2023, 06:17 AM	#3
babigguy Drives: 2017 ZL1, 2015 Z51 vette 2005 gto Join Date: Sep 2009 Location: New Castle,pa Posts: 252	Will 285/35 fit the front? __________________

05-28-2023, 06:26 AM	#4
laynlo15 Drives: 2022 Lt1 A10 Join Date: Nov 2015 Location: clark, mo Posts: 8,860	I run a 305 35 20 Nitto 555 R2 on the rear and a 245 40 20 on the front. You need to be somewhere around 27.5 tall. I'd run a 275 35 20 up front, 27.6 tall. __________________ 2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff

06-10-2023, 07:40 PM	#11
babigguy Drives: 2017 ZL1, 2015 Z51 vette 2005 gto Join Date: Sep 2009 Location: New Castle,pa Posts: 252	So went with the 275/35/20’s and codes cleared thanks for the help!!! __________________

05-28-2023, 05:44 PM	#7
WhiteMale Drives: 23 ZL1 A10 Rapid Blue Join Date: Aug 2020 Location: MO Posts: 1,983	I think people runna 305/35 without these problems, sure you didnt rub through the harness back there and your throwing codes?

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