[Raven87]

Originally Posted by oldfriend

Not really , it's more like 9/16"

Goes like this

315x35%=110.25MM = 4" 5/16

315x30% =94.50MM = 3" 3/4 ( 4"5/16-- 3"3/4= 9/16 ) of tire wall !

But I see from where you coming from , but the lower tirewall , that seat on the pavement doesn't count to creat the rubbing issues , it really doesn't !

Don't you have to have to double that number to get the full effect if you are talking about tire height? That dimension is only for one side of the tire - that effect has to be doubled IF you are talking about tire height.

If that is correct, then yes, the overall tire height is a little over an inch taller, about an inch and 1/8.

[Eric SS]

Originally Posted by Raven87

Don't you have to have to double that number to get the full effect if you are talking about tire height? That dimension is only for one side of the tire - that effect has to be doubled IF you are talking about tire height.

If that is correct, then yes, the overall tire height is a little over an inch taller, about an inch and 1/8.

Regardless of the math, like I mentioned above, just go to a tire manufacturers website and look at the same model of tire that is available in both a 315/35 and 315/30 (or 305/35 & 305/30) and you'll see they are about 1" difference in diameter and they are also 1" taller than the stock 275/35/20. The 305/30R20 is the same height as stock and is therefor the correct tire to go with. While the 315/35 or 305/35 will fill in the fender gap better, it is not the correct tire size to use. I've said this repeatedly on here but few seem to listen and keep going with the 35% tire.

[HDRDTD]

Note: back when I bought my MPSS's, (in the 315/35/20 size), tirerack had them in two styles, K1 and K2.

The K2's (that I have) had a tread width of 11" and a tread depth of 10/32".
The K1's had a tread width of 11.5" (a bit wider) and a tread depth of 7/32" (a bit shallower)

I found a tire calculator somewhere on line (can't remember where) and plugged in the details for the K2 dimensions and the stock ZL1 305/35/20's.
The differences it tire height were minimal resulting in a speed difference at 70mph of less than 1mph.

If you're worried about rubbing and can still find the narrower K2's, you might have better luck that the K1's with their slightly wider tread depth.

[Raven87]

Originally Posted by Eric SS

Regardless of the math, like I mentioned above, just go to a tire manufacturers website and look at the same model of tire that is available in both a 315/35 and 315/30 (or 305/35 & 305/30) and you'll see they are about 1" difference in diameter and they are also 1" taller than the stock 275/35/20. The 305/30R20 is the same height as stock and is therefor the correct tire to go with. While the 315/35 or 305/35 will fill in the fender gap better, it is not the correct tire size to use. I've said this repeatedly on here but few seem to listen and keep going with the 35% tire.

Exactly.

[lDejavul]

Originally Posted by HDRDTD

Note: back when I bought my MPSS's, (in the 315/35/20 size), tirerack had them in two styles, K1 and K2.

The K2's (that I have) had a tread width of 11" and a tread depth of 10/32".
The K1's had a tread width of 11.5" (a bit wider) and a tread depth of 7/32" (a bit shallower)

I found a tire calculator somewhere on line (can't remember where) and plugged in the details for the K2 dimensions and the stock ZL1 305/35/20's.
The differences it tire height were minimal resulting in a speed difference at 70mph of less than 1mph.

If you're worried about rubbing and can still find the narrower K2's, you might have better luck that the K1's with their slightly wider tread depth.

Are you talking about this site?

http://www.willtheyfit.com/

[2SSRS@Gen5diy]

You need to run the 305/30 we tested this and had no rubbing.

[drivingagain]

Can you post some pictures with what you decide to run?

[oldfriend]

Originally Posted by Raven87

Don't you have to have to double that number to get the full effect if you are talking about tire height? That dimension is only for one side of the tire - that effect has to be doubled IF you are talking about tire height.

If that is correct, then yes, the overall tire height is a little over an inch taller, about an inch and 1/8.

If one is talking about the tire rubbing issue , it ONLY counts the upper section , the ONE THAT MAY RUBB. Is the one from the center of the diameter going up to the quarter panel , the other half is in contact ( hopefully ) with the asphalt , right ?
Total eight only comes into play , when one is talking about ABS / gear ratio and or speed accuracy on the speedometer/odometer , because it will change the tire rotations needed per mile

[lDejavul]

is there much performance difference in running a 315/35 vs a 305/30? I really dont care about looks I just want some more traction.

[MRRWheelsInc]

Here is something that got us all confused..... on our first trial we had a set of M228 wheels slapped on 275/40 and 315/35 that where meant for the 5gen so we placed it on the 2016 and we had to add a small 3mm rear spacer because it rubbed on the inner liner inside, so we went from a 43et - 40et this work but of course the tire was tall for the 6 gen trial and error, the next tire we tested was a 305/35/20 Pirelli and that rubbed and a spacer did not fix that, well must have been the curve on the tire as it only rubbed on the driver side rear where there is a small wire harness behind the carpet. now the last car that we have completed was all carefully done by one of the members here mention rubbing but disappeared with in a few miles driven as it was very minimal probably just the hairs on the tires, he ran BFgoodrich tires. 285/35/20 and 305/35/20.
Now our last client who help us do the test fit purchased 275/40/20 and 295/35/20 wheels are 20x10 front and 20x11 rears, no rubbing at all, no mods needed.

we have a white SS that we will be fitting with our Flowforged wheels in the coming week ( ill add some info on this) and we have another clients 2SS coming down for a set of M228 wheels as well, its been a revolving door with the new Camaro and we love it !!

[E-Ray]

Originally Posted by MRRWheelsInc

Here is something that got us all confused..... on our first trial we had a set of M228 wheels slapped on 275/40 and 315/35 that where meant for the 5gen so we placed it on the 2016 and we had to add a small 3mm rear spacer because it rubbed on the inner liner inside, so we went from a 43et - 40et this work but of course the tire was tall for the 6 gen trial and error, the next tire we tested was a 305/35/20 Pirelli and that rubbed and a spacer did not fix that, well must have been the curve on the tire as it only rubbed on the driver side rear where there is a small wire harness behind the carpet. now the last car that we have completed was all carefully done by one of the members here mention rubbing but disappeared with in a few miles driven as it was very minimal probably just the hairs on the tires, he ran BFgoodrich tires. 285/35/20 and 305/35/20.
Now our last client who help us do the test fit purchased 275/40/20 and 295/35/20 wheels are 20x10 front and 20x11 rears, no rubbing at all, no mods needed.

we have a white SS that we will be fitting with our Flowforged wheels in the coming week ( ill add some info on this) and we have another clients 2SS coming down for a set of M228 wheels as well, its been a revolving door with the new Camaro and we love it !!

Now i'm starting to get confused on what will fit and what won't. But it would be nice to know exactly what would be the widest wheel & tire fitment for the Gen6.

[MRRWheelsInc]

Originally Posted by E-Ray

Now i'm starting to get confused on what will fit and what won't. But it would be nice to know exactly what would be the widest wheel & tire fitment for the Gen6.

this all depends on the client, since the car is new people hurt over a slight mod.

if you want wide and are willing to do minor mods like cut a liner or move a wire the 315 wide will work.
if you dont want to touch anything and have a straight bolt on the 295 wide is for you. so depending on the width of the wheel in our case 20x10.5 or 11 i can easily do 295, 305 or 315

[drivingagain]

The 35 is what the problem is. I think from the sounds of it the 1LE that just got released by GM has the widest rim and tire combination that will fit right and the rear is a 305/30/20. I plan on copying the rim and tire combo of the 1LE.

People are trying to get a taller tire to fill the gap rather than the right tire and lower the car to reduce the gap. Personally I hate no tire gap unless it is track only car with really stiff suspension. Need room for the suspension to fully articulate on a daily driver.

[MrWray]

Originally Posted by drivingagain

Can you post some pictures with what you decide to run?

I ended up going with 20x10 with 275/30 on the front and 20x11 with 305/35 on the rear "Mickey Thompson Street Comp". I dont have any issues and the tread width looks as wide as the PSS 315s that i had on my 5th gen.

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