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305/30 R19 wheels on 12" wide tire possible?

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Old May 21, 2013 | 01:29 PM
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305/30 R19 wheels on 12" wide tire possible?

Hi everybody,

also in Germany my normal tire Combo(Michelin PS2 315/25 R19) is not avaible any more and I will Switch to Michelin PSS 305/30 R19. Is it possible to ride and install it on 12" wide tire or the tire is to wide? The tires are OZ Ultraleggera HLT.


Greets
 
Old May 21, 2013 | 02:06 PM
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Check the spec sheet on the tires. It states the acceptable rim width range.

I have those same tires and I think my wheels are 12" wide but I'm not sure.
 
Old May 21, 2013 | 02:37 PM
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yes absolutely it will work 100%
 
Old May 21, 2013 | 02:42 PM
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FYI Michelin specs a 10.5" to 11.5" wheel for that size tire.

BTW what front tire do you intend on running with the 305/30R19 rear tire? The 305/30R19 is 26.3" tall, so you will need a very tall tire (that will rub) unless you have removed the awd system.

Later, Steve
 
Old May 21, 2013 | 02:49 PM
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PSS 305/30/19 works well on 12" rim, I'm running this setup no problems

BTW when measured PSS 305/30/19 against 315/25/19 Nitto Invo's, PSS tires where 1" wider...
 

Last edited by SaMaS; May 21, 2013 at 02:51 PM.
Old May 21, 2013 | 03:56 PM
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PSS 305/30/19 I have this on my car on 11" 997 wheels and they look bulged out. I think a 12" would make them fit almost flush and look good.
 
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Old May 21, 2013 | 05:11 PM
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Originally Posted by Steve Jarvis
FYI Michelin specs a 10.5" to 11.5" wheel for that size tire.

BTW what front tire do you intend on running with the 305/30R19 rear tire? The 305/30R19 is 26.3" tall, so you will need a very tall tire (that will rub) unless you have removed the awd system.

Later, Steve

I run a 235/40 19 in the front. That makes the front just a little taller than the rear like OE ratios. There is absolutely no rubbing in the front on OE or H&R springs. No rubbing on the rear on OE but slight rubbing on the plastic inner fenders under compression with the H&R's.
 
Old May 21, 2013 | 08:01 PM
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A 305 wifit on a 10.5 rim. You have uber room
 
Old May 22, 2013 | 11:31 AM
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997.1 GT3 OEM fitment is a 305/30/19 on a 12" rim.
 
Old May 22, 2013 | 04:28 PM
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sounds good, thank you all for the replies.
I bought them today and after the Installation I will Report and upload a Picture.
 
Old May 23, 2013 | 11:59 AM
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Originally Posted by SaMaS
PSS 305/30/19 works well on 12" rim, I'm running this setup no problems

BTW when measured PSS 305/30/19 against 315/25/19 Nitto Invo's, PSS tires where 1" wider...
What front size tire did you run? 235/40 like sinKing said?

I just ordered ADV.1's in a 19x8.5 19x12 setup. I'm going to do the PSS 305's but want to make sure I get the right front tire.

I'm lowered on H&R.
 
Old May 23, 2013 | 12:31 PM
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Im running 235/35 R19 and Im happy.
 
Old May 23, 2013 | 01:13 PM
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All tire height specs below are specific to the Michelin PSS (except for the stock sizing), not calculated from the size.

I wanted to run a 305/30R19 (26.3" tall) rear tire, but stayed with a 295/30R19 (26.0" tall) rear tire. I new I couldn't go with a taller tire, since my current tire already rubs at full steering lock.

Since my 245/35R19 is 25.8" tall, I didn't want a bigger front to rear differential.
Front = 25.8"
Rear = 26.0"
Front to rear differential = 0.8%

Stock
Front = 25.3"
Rear = 24.9"
Front to rear differential -1.6%

Total difference between my setup and the stock setup = 2.4%

With a 305/30R19 on the rear and a 245/35R19 on the front, I felt it would have been too much.
Front = 25.8"
Rear = 26.3"
Front to rear differential = 1.9%

Total difference between the 305 setup and the stock setup = 3.5%

If a 235/40R19 (26.4" tall) which is taller, but more narrow would clear, than it might be the best setup.

Here's the 235/40R19 and 305/30R19 specs.
Front = 26.4"
Rear = 26.3"
Front to rear differential = -0.4%

Total difference between this setup and the stock setup = 1.2%

Of course, then the 305/30R19 would probably rub with my current offsets.

Okay, I'm done rambling.

Later, Steve
 
Old May 23, 2013 | 01:19 PM
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could you share your widths/offsets so i can compare to what i have coming and see if i'm going to have more or less inner fender clearance?
 
Old May 23, 2013 | 02:02 PM
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My wheels are Champion 19x8.5" front and 19x11" rear. I will have to measure the offsets.

I'll see if I can get it done tonight.

FYI my old 295/30R19 has rubbed on the inside and outside. I believe the ride height was much lower when it rubbed. I have had no rubbing on the rear with my current setup and alignment.

Later, Steve
 


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