315 squared? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

GAFreddy · 10-15-2021, 10:10 AM

Hey fellas,

I have what is probably a common question, just can't find the answer anywhere I search.

I want to square my tires and wheels. I have 315/35/20 on the rear, 285/35/20 fronts. I want to run 315/35/20 all the way around. Problem is, I don't know if the 315's would fit right on the 10" fronts or even fit in front? Or would 11" fit in the front, if needed? 2013 ZL1 Convertible.

Anyone's experience with this would be appreciated. Thanks in advance.

Full_Spectrum · 10-15-2021, 10:49 AM

315 is a bit big for a 10" rim.

You might be able to fit a 305 on a 10.5" rim, but in front, the tire height will likely contact the strut- unless you go to a 30 series tire.

The real issue is finding a wheel with the right offset/backspace. Look at the Z/28 wheel specs and go from there.

GAFreddy · 10-16-2021, 11:52 AM

Quote:

Originally Posted by Full_Spectrum

315 is a bit big for a 10" rim.

You might be able to fit a 305 on a 10.5" rim, but in front, the tire height will likely contact the strut- unless you go to a 30 series tire.

The real issue is finding a wheel with the right offset/backspace. Look at the Z/28 wheel specs and go from there.

Dang, I kind of feared that.

Those are the rims I'm lookin for. It looks like they're hard to find. The OG Z28 rims.

Thanks for the reply.

Aqua Blue RS/SS · 10-16-2021, 12:01 PM

This is an option for Z28 wheels, not OE but lots of guys here have them and I’ve not really seen anyone with issues.
You can buy 4 11” wheels from MRR even though it’s not listed as an option below.
https://www.phastekperformance.com/C...z28-wheels.htm

GAFreddy · 10-16-2021, 12:07 PM

Quote:

Originally Posted by Aqua Blue RS/SS

This is an option for Z28 wheels, not OE but lots of guys here have them and I’ve not really seen anyone with issues.
You can buy 4 11” wheels from MRR even though it’s not listed as an option below.
https://www.phastekperformance.com/C...z28-wheels.htm

Good stuff man.

11" will fit on the front?

ZMEnow · 10-16-2021, 12:24 PM

Quote:

Originally Posted by TexasTex

Dang, I kind of feared that.

Those are the rims I'm lookin for. It looks like they're hard to find. The OG Z28 rims.

Thanks for the reply.

I have run a 285 square setup from Factory Reproductions since a couple of months after new 2013. The OEM and GY,s stay in the basement for an occasional track day. The rims have performed very well and they have every GM rim with correct offsets. Probably not as cheap as when I got mine as then 975.00 for set of 4 gloss black with TPS sensors.

AlanRubin · 10-18-2021, 03:51 PM

Wider tires fit almost any rim, the sidewalls will look like balloons if the rim isn't
ideal for the tire. 315s will FIT just fine, but what will the sidewalls look like...
FIT means FIT, and does not mean "WILL WORK" or "LOOK GOOD."

GAFreddy · 10-20-2021, 12:25 PM

Quote:

Originally Posted by ZMEnow

I have run a 285 square setup from Factory Reproductions since a couple of months after new 2013. The OEM and GY,s stay in the basement for an occasional track day. The rims have performed very well and they have every GM rim with correct offsets. Probably not as cheap as when I got mine as then 975.00 for set of 4 gloss black with TPS sensors.

So, you run 285's all across? I have them on the front, but want to go squared. 285's don't hold the Z on the ground, so that's why I want to go bigger.

Quote:

Originally Posted by AlanRubin

Wider tires fit almost any rim, the sidewalls will look like balloons if the rim isn't
ideal for the tire. 315s will FIT just fine, but what will the sidewalls look like...
FIT means FIT, and does not mean "WILL WORK" or "LOOK GOOD."

Ok, I'll clarify.

I want to go squared. 285's don't cut it on the rear of the Z. This is a cruiser car with the occasional stop light run. I want to be able to rotate, not rub, hook decently and not look stupid. Does that clarify? Hahah!

Thanks for the responses guys, I appreciate it.

ZMEnow · 10-20-2021, 05:25 PM

Quote:

Originally Posted by TexasTex

So, you run 285's all across? I have them on the front, but want to go squared. 285's don't hold the Z on the ground, so that's why I want to go bigger.

Ok, I'll clarify.

I want to go squared. 285's don't cut it on the rear of the Z. This is a cruiser car with the occasional stop light run. I want to be able to rotate, not rub, hook decently and not look stupid. Does that clarify? Hahah!

Thanks for the responses guys, I appreciate it.

You are stock, I am plus 700 so I have managed to whip plenty of butt with with a 285 Michelin M/S capping a best at track of 11.25 at 124.9. But yes you need to know what you are doing but you said its a cruiser so didn't think you were hunting the best 0 - 60's.. Best of luck..

GAFreddy · 10-21-2021, 05:42 PM

Quote:

Originally Posted by ZMEnow

You are stock, I am plus 700 so I have managed to whip plenty of butt with with a 285 Michelin M/S capping a best at track of 11.25 at 124.9. But yes you need to know what you are doing but you said its a cruiser so didn't think you were hunting the best 0 - 60's.. Best of luck..

I'm no longer stock. Haven't updated my list, but I'm not to your numbers yet.

Regardless, I can't keep my SS hooked with the 275's that are on that. That car is around 500whp now. That's how this started, I took he tires and wheels from the Z and swapped with the SS. The 275's on the Z feels like I'm on ice. I'll check out the Michelin M/S's. Thanks.

GAFreddy · 11-17-2021, 11:58 AM

So, did a little verification of sizing for myself:

315's on 11's or 10's do not fit the FRONT of the 5th Gen ZL1. Not even close on the 11", will rub on the 10".

I went to re-swap the rims from the SS back to the ZL1, and decided to try it out. Not a chance.

HDRDTD · 11-17-2021, 01:16 PM

Quote:

Originally Posted by GAFreddy

So, did a little verification of sizing for myself:

315's on 11's or 10's do not fit the of the 5th Gen ZL1. Not even close on the 11", will rub on the 10".

I went to reshape the rims from the SS back to the ZL1, and decided to try it out. Not a chance.

That's news to me. I've been running 315/25/20 Michelin Pilot Super Sports on the stock rear 11" rims of my 2013 ZL1 for the past 8 years with NO issues whatsoever.

CamaroCracka · 11-17-2021, 01:31 PM

I run 325/30/20s on the rear with no problem. He must be referring to the fronts.

HDRDTD · 11-17-2021, 02:37 PM

Quote:

Originally Posted by CamaroCracka

I run 325/30/20s on the rear with no problem. He must be referring to the fronts.

I would agree with fit issues on the front with 315's no matter the width of the wheel either 10's or 11's if that's what he meant.

10-15-2021, 10:10 AM	#1
GAFreddy Account Suspended Drives: 2010 2SS & 2013 ZL1 Vert Join Date: Mar 2015 Location: Watching Airplanes Takeoff Posts: 348	315 squared? Hey fellas, I have what is probably a common question, just can't find the answer anywhere I search. I want to square my tires and wheels. I have 315/35/20 on the rear, 285/35/20 fronts. I want to run 315/35/20 all the way around. Problem is, I don't know if the 315's would fit right on the 10" fronts or even fit in front? Or would 11" fit in the front, if needed? 2013 ZL1 Convertible. Anyone's experience with this would be appreciated. Thanks in advance.

10-16-2021, 12:01 PM	#4
Aqua Blue RS/SS Drives: ABM #93 Join Date: Oct 2018 Location: Lotaburger Posts: 2,689	This is an option for Z28 wheels, not OE but lots of guys here have them and I’ve not really seen anyone with issues. You can buy 4 11” wheels from MRR even though it’s not listed as an option below. https://www.phastekperformance.com/C...z28-wheels.htm __________________ ABM #2399 2SS/RS:SOLD ABM #93 2SS/RS Black Rally stripes, Titanium Interior 4,000 miles: GM GFX side skirts and diffuser waiting on paint, GM dovetail, GM heritage, RPI ZL1 style splitter. ‘87 IROC-Z Iroc blue. all original unmolested with 50K miles.

11-17-2021, 11:58 AM	#11
GAFreddy Account Suspended Drives: 2010 2SS & 2013 ZL1 Vert Join Date: Mar 2015 Location: Watching Airplanes Takeoff Posts: 348	So, did a little verification of sizing for myself: 315's on 11's or 10's do not fit the FRONT of the 5th Gen ZL1. Not even close on the 11", will rub on the 10". I went to re-swap the rims from the SS back to the ZL1, and decided to try it out. Not a chance. Last edited by GAFreddy; 11-20-2021 at 12:11 PM. Reason: Important word left out

11-17-2021, 01:31 PM	#13
CamaroCracka Drives: 2010 Turbo LS3 Join Date: Dec 2009 Location: Palm Bay, FL Posts: 2,729	I run 325/30/20s on the rear with no problem. He must be referring to the fronts. __________________ 2010 SS - On3 kit with downpipe cutout, CTR 78/80, CompCam 239/251 620/632 122+4, E85, Z28 suspension and ZL1 diff with Outlaw axles. Gen6 ZL1/1LE brakes. 2011 Vert - 416/w 230/236 .612/.602 115lsa, 1LE suspension w/32mm rear bar. Z28 diff. ZL1 brakes.

10-15-2021, 10:49 AM	#2
Full_Spectrum Drives: 2013 ZL1 Join Date: Jan 2020 Location: Virginia Posts: 55	315 is a bit big for a 10" rim. You might be able to fit a 305 on a 10.5" rim, but in front, the tire height will likely contact the strut- unless you go to a 30 series tire. The real issue is finding a wheel with the right offset/backspace. Look at the Z/28 wheel specs and go from there.

10-18-2021, 03:51 PM	#7
AlanRubin Banned Drives: 2010 LS Join Date: Feb 2021 Location: Pgh Posts: 411	Wider tires fit almost any rim, the sidewalls will look like balloons if the rim isn't ideal for the tire. 315s will FIT just fine, but what will the sidewalls look like... FIT means FIT, and does not mean "WILL WORK" or "LOOK GOOD."