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Anyone Run 305's on stock rears? (Basemodel)

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Old 02-05-2017, 03:28 AM
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Wrigy3
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Default Anyone Run 305's on stock rears? (Basemodel)

I'm in the market for a new set of tires, and after some research I'm pretty set on getting a set of the Pilot Supersports i keep hearing so much about.

Although, i remember hearing at one point and time about being able to run 305's on the stock 19x10's can anyone elaborate on this? Or even link me to a thread thats already done that?

PS: yes, i tried the search feature, but that thing wouldnt know a snake if it bit it.

Thanks!

Last edited by Wrigy3; 02-05-2017 at 03:30 AM.
Old 02-05-2017, 04:38 AM
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advancivic
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You'll be fine
Old 02-05-2017, 05:31 AM
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Mike's LS3
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305/35/19 MSS Yes, on 10" rims.

305/30/19 MSS No, minimum 10.5" rim.

Why, because the "30" series tire has one inch more tread width which will only roll up on the shoulders of a 10" rim. May cause some instability at higher speeds. No benefit running a wider tread on a narrow rim if the contact patch is lifted or rolled up.

"35" series tire has 10.7" tread width.
"30" series tire has 11.7" tread width.

I am running 305/30/19 Michelin Super Sport tires on 10.5" rims, no problems.

Last edited by Mike's LS3; 02-05-2017 at 05:33 AM.
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Old 02-05-2017, 07:37 AM
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paulrichy
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it is well documented that up to 325's on a base c6 will fit with no modification.
Old 02-05-2017, 07:43 AM
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Wrigy3
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Originally Posted by Mike's LS3
305/35/19 MSS Yes, on 10" rims.

305/30/19 MSS No, minimum 10.5" rim.

Why, because the "30" series tire has one inch more tread width which will only roll up on the shoulders of a 10" rim. May cause some instability at higher speeds. No benefit running a wider tread on a narrow rim if the contact patch is lifted or rolled up.

"35" series tire has 10.7" tread width.
"30" series tire has 11.7" tread width.

I am running 305/30/19 Michelin Super Sport tires on 10.5" rims, no problems.
Great information! Thanks for the response!

Originally Posted by paulrichy
it is well documented that up to 325's on a base c6 will fit with no modification.
Where exactly might this documentation be? Im having an awful hard time finding it among all the "it puts too much un-needed stress" responses.
Old 02-05-2017, 11:07 AM
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nenji01
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i had 305/30/19 for over a year or so and it was fine raced and everything with does tires no problem
Old 02-05-2017, 07:16 PM
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Dcasole
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Originally Posted by Mike's LS3
305/35/19 MSS Yes, on 10" rims.

305/30/19 MSS No, minimum 10.5" rim.

Why, because the "30" series tire has one inch more tread width which will only roll up on the shoulders of a 10" rim. May cause some instability at higher speeds. No benefit running a wider tread on a narrow rim if the contact patch is lifted or rolled up.

"35" series tire has 10.7" tread width.
"30" series tire has 11.7" tread width.

I am running 305/30/19 Michelin Super Sport tires on 10.5" rims, no problems.
Mike what size front do you run with the 305 as i want to get a set of these

Dave
Old 02-06-2017, 12:31 AM
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ProfessorDeath
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Originally Posted by paulrichy
it is well documented that up to 325's on a base c6 will fit with no modification.
Old 02-06-2017, 01:54 AM
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LMB-Z
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I had 305's on the rear of my 2005 coupe, stock wheels, with absolutely no problems whatsoever. They were still on it when I traded it for the Z06. I lost all of m pictures or I would post one (bad flash drive, lost 625 pics). Not sure it helped with traction, but it looked good.

Last edited by LMB-Z; 02-06-2017 at 01:52 PM.
Old 02-06-2017, 07:38 AM
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Brandon619
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I'm running 305's in the rear of my base and I've haven't had any issues to date.




Old 02-06-2017, 09:04 AM
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Boomer111
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But what width are the aftermarket rims, 11 in.?

They do not look like oem size 10 in.

Last edited by Boomer111; 02-06-2017 at 09:04 AM.
Old 02-06-2017, 09:08 AM
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Boomer111
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I ran 265 on 9.5in and 305 on 11in.

I change out back to stock widths after a year.

I felt the wider tires made the steering feel slow. The car just wasn't a nimble.

Now this is on the street, no track time.
Old 02-06-2017, 09:16 AM
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Boomer111
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A 305 needs a 10.5 - 11.5 width rim. with 11 in being center hit.

Putting a 305 on a stock 10 in rim is not recommended by tire mfgs.

Ya it will fit but no optimally.

Why do this with a performance car?
Old 02-06-2017, 02:09 PM
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Originally Posted by Dcasole
Mike what size front do you run with the 305 as i want to get a set of these

Dave
Front: 265/35/18 MSS with 18X9 TSW Interlago rims.

Rear: 305/30/19 MSS with 19X10.5 TSW Interlago rims.

My speedo was about 2 mph off at 60 mph, but I corrected it in the tune.

Front and rear diameter 1" difference and no issues with Traction control.
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Old 02-06-2017, 02:12 PM
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Corvette_Ed
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Originally Posted by paulrichy
it is well documented that up to 325's on a base c6 will fit with no modification.
You're missing some key information here, and no, 325's will not fit a base C6. 305's are the largest size.
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Old 02-06-2017, 02:32 PM
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Mike's LS3
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Originally Posted by Brandon619
I'm running 305's in the rear of my base and I've haven't had any issues to date.




Those rims look like TSW Nuburgring rims which are 10.5" rear rims. Correct size for the 305's.

Last edited by Mike's LS3; 02-06-2017 at 02:37 PM.
Old 02-06-2017, 02:54 PM
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Biggie G
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305s are the largest I believe.....it rides nice, i used the spacers at the auto parts store and the lug nuts that extend deeper into the rim for more grip.....im not sure of the exact name of lug nuts....you'll need em thou if you run the spacers ....
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Last edited by Biggie G; 02-06-2017 at 02:55 PM.

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Old 02-06-2017, 03:27 PM
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Frankie15
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I was really interested in getting 305s until someone mentioned that there will be increased fender gap due to the 305s being shorter than the 285s. Is this true?
Old 02-06-2017, 04:11 PM
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Biggie G
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it's possible but all you need to do is adjust the lowering bolts
Old 02-06-2017, 04:21 PM
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mbowers13
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Originally Posted by Frankie15
I was really interested in getting 305s until someone mentioned that there will be increased fender gap due to the 305s being shorter than the 285s. Is this true?



Here's 305's, and lowered on WCC bolts.


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