Nitto NT555RII - Page 2

6spdhyperblue · 05-13-2021, 12:02 PM

Quote:

Originally Posted by KingLT1

Anything over 28 psi isn't utilizing these tires capability. Per Dragy I 60ft 1.75(3.0 0-60) on a unprepped street with 305/35/20 @ 26 psi. I have tried running above 28 psi to keep the tire light off and 1.9(3.3 0-60) is the best I can do. A well prepped track might yield different results.

If u know someone with a gds they can set the warning to a lower psi

SteveV · 05-13-2021, 02:38 PM

Well, I checked pressures before driving it to work this morning.

Turns out, I had the rears at 32 psi each and the front at 34.

I have lowered the rears to 28.

KingLT1 · 05-13-2021, 02:42 PM

Quote:

Originally Posted by 6spdhyperblue

If u know someone with a gds they can set the warning to a lower psi

Wish I did...I would like to lower mine.

IneedAZ · 05-13-2021, 05:19 PM

Quote:

Originally Posted by KingLT1

Anything over 28 psi isn't utilizing these tires capability. Per Dragy I 60ft 1.75(3.0 0-60) on a unprepped street with 305/35/20 @ 26 psi. I have tried running above 28 psi to keep the tire light off and 1.9(3.3 0-60) is the best I can do. A well prepped track might yield different results.

I would think the lower psi you used on a 20" may be needed but maybe not as low with a larger sidewall like the 17s. Guess it is a matter of trial and error.

Curious how many of you had your tires heat treated prior to putting them on the car?

goata8 · 05-13-2021, 11:49 PM

Are most of yall using the 305/35/20 on stock wheels? I run mine at 30 fwiw.

I ask because I just saw they also have 305/30s...

LonghornMM · 05-14-2021, 06:54 PM

Quote:

Originally Posted by goata8

Are most of yall using the 305/35/20 on stock wheels? I run mine at 30 fwiw.

I ask because I just saw they also have 305/30s...

My NT555RII's are stock size on stock wheels, 305/30 20. I run them at 28 PSI on the street.

KingLT1 · 05-15-2021, 10:27 AM

Quote:

Originally Posted by goata8

Are most of yall using the 305/35/20 on stock wheels? I run mine at 30 fwiw.

I ask because I just saw they also have 305/30s...

SS runs taller tires then ZL1 but ZL1 runs wider. Since you have a SS I would go with the 295/35/20 555R2 on the stock wheel. I put the 305/35/20 on my stock wheels and it's a touch too wide but still works. I didn't realize they run wider then the previous gen 555r which fit the stock wheel about perfect. I will likely get the 295/35/20 next time I need tires.

6spdhyperblue · 05-15-2021, 11:50 AM

How low of a temp can u run these? Do u know the temps for damaging the tire or lack of traction? They’re summer only? 40*

KingLT1 · 05-16-2021, 11:36 PM

No issues here in 40 degree weather.

LiqTenExp · 05-17-2021, 05:16 AM

I've had mine out at low as 45°F and they don't really complain, in fact they are better than the stock GYSC at this temp, LOL

IneedAZ · 09-29-2021, 08:11 PM

Since the retune, I lowered my rears to 28psi cold and still spin. I may try 26 or 27. Again, these are on 17s.

Camaro1973 · 09-29-2021, 10:09 PM

Quote:

Originally Posted by IneedAZ

Since the retune, I lowered my rears to 28psi cold and still spin. I may try 26 or 27. Again, these are on 17s.

They have to be hot.

KingLT1 · 09-30-2021, 08:56 AM

Quote:

Originally Posted by IneedAZ

Since the retune, I lowered my rears to 28psi cold and still spin. I may try 26 or 27. Again, these are on 17s.

28 isn't low enough... you are going to have to get them down to around 23-24psi and heat them up a little for a launch. I see a 2 tenth difference on my 0-60 time and 2 tenth on my 60ft going from 28-30psi down to 23 psi.

IneedAZ · 09-30-2021, 11:01 AM

Quote:

Originally Posted by KingLT1

28 isn't low enough... you are going to have to get them down to around 23-24psi and heat them up a little for a launch. I see a 2 tenth difference on my 0-60 time and 2 tenth on my 60ft going from 28-30psi down to 23 psi.

I had set them at 28 cold a couple days ago and as we get better weather finally i noticed today they were at 26 cold. How are they driving when going down to 23 cold? Guess that will appx 25/6 when hot? I don't want to drive around town with them too low if its gonna feel mushy.

05-13-2021, 02:38 PM	#16
SteveV Drives: 2018 ZL1 Camaro 6M Red Hot Join Date: Aug 2013 Location: Cary, NC Posts: 1,137 View My Garage	Well, I checked pressures before driving it to work this morning. Turns out, I had the rears at 32 psi each and the front at 34. I have lowered the rears to 28. __________________ People are a lot like slinky's: not very helpful most of the time, but they bring a smile to your face when pushed down the stairs...

05-13-2021, 11:49 PM	#19
goata8 Drives: 2023 LT1 A10 Join Date: May 2017 Location: Palma Sola, FL Posts: 141	Are most of yall using the 305/35/20 on stock wheels? I run mine at 30 fwiw. I ask because I just saw they also have 305/30s... __________________ 2023 LT1, A10, NPP, Tech, Recaros, BVFKQ6 (Ordered 6/24, TPW 7/25, Built 8/1, Picked Up 10/3) Past: 2017 1SS A8, 1998 SS M6, 1995 Z28 M6

05-15-2021, 11:50 AM	#22
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,675	How low of a temp can u run these? Do u know the temps for damaging the tire or lack of traction? They’re summer only? 40* __________________ ‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122 ‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold)

05-16-2021, 11:36 PM	#23
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,799	No issues here in 40 degree weather. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

05-17-2021, 05:16 AM	#24
LiqTenExp Drives: 2017 ZL1 Join Date: Jan 2017 Location: NJ Posts: 905	I've had mine out at low as 45°F and they don't really complain, in fact they are better than the stock GYSC at this temp, LOL __________________ 2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)

09-29-2021, 08:11 PM	#25
IneedAZ Drives: 2017 ZL1 A10 & 2021 BMW M340i x Dr Join Date: Mar 2009 Location: Tampa Posts: 5,110 View My Garage	Since the retune, I lowered my rears to 28psi cold and still spin. I may try 26 or 27. Again, these are on 17s. __________________ 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

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