275/40/20 Fronts 305/35/20 Rears Work?

Nmolina9239 · 05-14-2020, 08:38 PM

Does anyone know if the following will not only fit but not mess with stabilitrak etc?

275/40/20 on 20 x 10 +23 Fronts
305/35/20 on 20 x 11 +43 Rears

Thanks

Markoz28 · 05-15-2020, 07:59 AM

I don’t know why ppl go with these sizes. The front is taller than the back and since the beginning of history that has been a bad idea. Plus it look strange.

Why not 285/30 and 305/30? This is stock on the ZL1 and works out great

TheRealJA105 · 05-15-2020, 09:23 AM

I don't think a 275/40/20 will fit under the magride spring perch.

KingLT1 · 05-15-2020, 09:24 AM

No the front will be taller then the rear. You will want to run 315/35/20 in the rear then they will be the same height @ 28.7". Or you could do 275/35/20 and 305/35/30, the rears will be a little taller but within range so it doesn't cause any TCS or Stabilitrak issues. A little taller rear looks better imo.

RuthleSSchevy · 05-15-2020, 06:48 PM

275 40 20 rubs on the front fender liner in the footwell area when the wheels are turned left or right. There is no way to clearance this area

Nmolina9239 · 06-20-2020, 10:16 AM

What are good tire options for the factory ss wheels, 245/40/20 and 275/35/20? I wanted to get something like the MT ET Street SS maybe? I make just north of 700whp

Joshinator99 · 06-20-2020, 10:23 AM

Quote:

Originally Posted by Nmolina9239

What are good tire options for the factory ss wheels, 245/40/20 and 275/35/20? I wanted to get something like the MT ET Street SS maybe? I make just north of 700whp

King and I both run the Nitto NT555R in 305/35/20 on the stock SS rear tires with Whipple blowers. I think they are better on the street than MT’s in my humble opinion. You could run the standard NT555 on the front if you want them to “match”.

Nmolina9239 · 06-20-2020, 01:36 PM

@joshinator99, , what size would I have to use for the front if I took your recommendation for the rears?

Joshinator99 · 06-20-2020, 01:41 PM

Quote:

Originally Posted by Nmolina9239

@joshinator99, , what size would I have to use for the front if I took your recommendation for the rears?

I'm currently running the stock run flats in the front (245/40/20). But you could easily go a little bigger if you wanted to.

arpad_m · 06-20-2020, 02:42 PM

The stock SS setup is also taller in the front (27.7" vs 27.6"), just saying.

OP, have you already bought these tires, or just some 1LE wheels and are currently looking for the best tire sizes? 275/40 will almost certainly hit the spring perch, you can try to avoid that with spacers, but first, what are your actual goals? More traction, better cornering, more sidewall for a smoother ride, better looks, or...?

Nmolina9239 · 06-21-2020, 07:40 PM

Next year I will look into buying some weld wheels for the drag strip. Possibly even another set of wheels and tires for the street, something smaller then the factory 20's. I think for this year I just want to see the following on the factory SS wheels, non 1le.

A. Whats the biggest tire I can fit on the factory wheels, both front and rear even if i have to do the harness relocation in the back.

B. I believe you have to keep the front and rear tire sizes within a certain height difference from each other? .5" maybe? Can this be changed using hptuners?

C. My goal would be to have tires that handle well on the factory wheels, definitely wider that I can still do a roll on someone if needed.

Thanks

05-14-2020, 08:38 PM	#1
Nmolina9239 Drives: 2018 2SS Join Date: Sep 2018 Location: Niverville, NY Posts: 117	275/40/20 Fronts 305/35/20 Rears Work? Does anyone know if the following will not only fit but not mess with stabilitrak etc? 275/40/20 on 20 x 10 +23 Fronts 305/35/20 on 20 x 11 +43 Rears Thanks __________________ 2018 Camaro, Whipple Charged, RotoFab Big Gulp, Katech 103mm, LT4 Fueling w/ JMS BAP, GPI Drop in Rods and Pistons, Custom Cam, Ported Heads, Kooks LTHs w/ Green Cats and Mid Pipes, Corsa Extreme Mufflers, DSS Driveshaft & CV Shafts, Might Mouse Catch Can, Circle D T.C. #Team GPI

05-15-2020, 09:24 AM	#4
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,797	No the front will be taller then the rear. You will want to run 315/35/20 in the rear then they will be the same height @ 28.7". Or you could do 275/35/20 and 305/35/30, the rears will be a little taller but within range so it doesn't cause any TCS or Stabilitrak issues. A little taller rear looks better imo. __________________ 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

05-15-2020, 06:48 PM	#5
RuthleSSchevy Drives: 2016Camaro+1968Chevelle+1954BelAir Join Date: Feb 2013 Location: NH Posts: 149	275 40 20 rubs on the front fender liner in the footwell area when the wheels are turned left or right. There is no way to clearance this area __________________ "Lead me, follow me, or get out of my way." GGSP

06-20-2020, 10:16 AM	#6
Nmolina9239 Drives: 2018 2SS Join Date: Sep 2018 Location: Niverville, NY Posts: 117	What are good tire options for the factory ss wheels, 245/40/20 and 275/35/20? I wanted to get something like the MT ET Street SS maybe? I make just north of 700whp __________________ 2018 Camaro, Whipple Charged, RotoFab Big Gulp, Katech 103mm, LT4 Fueling w/ JMS BAP, GPI Drop in Rods and Pistons, Custom Cam, Ported Heads, Kooks LTHs w/ Green Cats and Mid Pipes, Corsa Extreme Mufflers, DSS Driveshaft & CV Shafts, Might Mouse Catch Can, Circle D T.C. #Team GPI

06-20-2020, 01:36 PM	#8
Nmolina9239 Drives: 2018 2SS Join Date: Sep 2018 Location: Niverville, NY Posts: 117	@joshinator99, , what size would I have to use for the front if I took your recommendation for the rears? __________________ 2018 Camaro, Whipple Charged, RotoFab Big Gulp, Katech 103mm, LT4 Fueling w/ JMS BAP, GPI Drop in Rods and Pistons, Custom Cam, Ported Heads, Kooks LTHs w/ Green Cats and Mid Pipes, Corsa Extreme Mufflers, DSS Driveshaft & CV Shafts, Might Mouse Catch Can, Circle D T.C. #Team GPI

05-15-2020, 07:59 AM	#2
Markoz28 Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018 Location: RGV Texas Posts: 1,527	I don’t know why ppl go with these sizes. The front is taller than the back and since the beginning of history that has been a bad idea. Plus it look strange. Why not 285/30 and 305/30? This is stock on the ZL1 and works out great

05-15-2020, 09:23 AM	#3
TheRealJA105 Drives: 2013 C6Z06 Join Date: Nov 2016 Location: PA Posts: 1,577	I don't think a 275/40/20 will fit under the magride spring perch.

06-20-2020, 02:42 PM	#10
arpad_m Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017 Location: East Tennessee Posts: 11,601 View My Garage	The stock SS setup is also taller in the front (27.7" vs 27.6"), just saying. OP, have you already bought these tires, or just some 1LE wheels and are currently looking for the best tire sizes? 275/40 will almost certainly hit the spring perch, you can try to avoid that with spacers, but first, what are your actual goals? More traction, better cornering, more sidewall for a smoother ride, better looks, or...? __________________ 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

06-21-2020, 07:40 PM	#11
Nmolina9239 Drives: 2018 2SS Join Date: Sep 2018 Location: Niverville, NY Posts: 117	Next year I will look into buying some weld wheels for the drag strip. Possibly even another set of wheels and tires for the street, something smaller then the factory 20's. I think for this year I just want to see the following on the factory SS wheels, non 1le. A. Whats the biggest tire I can fit on the factory wheels, both front and rear even if i have to do the harness relocation in the back. B. I believe you have to keep the front and rear tire sizes within a certain height difference from each other? .5" maybe? Can this be changed using hptuners? C. My goal would be to have tires that handle well on the factory wheels, definitely wider that I can still do a roll on someone if needed. Thanks __________________ 2018 Camaro, Whipple Charged, RotoFab Big Gulp, Katech 103mm, LT4 Fueling w/ JMS BAP, GPI Drop in Rods and Pistons, Custom Cam, Ported Heads, Kooks LTHs w/ Green Cats and Mid Pipes, Corsa Extreme Mufflers, DSS Driveshaft & CV Shafts, Might Mouse Catch Can, Circle D T.C. #Team GPI Last edited by Nmolina9239; 06-21-2020 at 08:02 PM.

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