305/30-20 tire on stock or aftermarket 20" wheel

Sep 25, 2017 | 09:29 AM

dlefty

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305/30-20 tire on stock or aftermarket 20" wheel

Anyone have a pic of a 305/30-20 tire on a stock or aftermarket 20" wheel on their GTS/GT that they could share?

Sep 25, 2017 | 10:06 AM

emericr

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From: Naples FL

2021 Porsche TTS

Should be receiving my custom wheels back this week (getting recoated) but I believe I have that size with PS4s in back.
Here are pics of them.
http://strassewheels.com/case/mercede-benz-amg-gt/

Sep 25, 2017 | 06:06 PM

okbarnett

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Porsche guy who drives SL63 w/ perf pkg AND perf suspension

those should be 20x11 and 305 is for a 11

Feb 17, 2019 | 11:09 PM

Southpaw07

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From: OH

2017 Audi R8 V10 Plus

I'm also looking to run 305's on the stock 11" rear wheels on my Edition 1. Anyone have feedback or pics on this setup?

My Porsches had 305's on OEM 11" width wheels and they looked just right. The 295's on my stock Edition 1 wheels look a bit stretched.

Feb 17, 2019 | 11:22 PM

NJC63

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From: North Jersey

2009 C63 AMG

I'll be installing Michelin PS4S on 11" OEM rears next week. I'll post a photo when they're on the car.

Feb 28, 2019 | 06:25 PM

Southpaw07

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From: OH

2017 Audi R8 V10 Plus

Quote:

Originally Posted by emericr

Should be receiving my custom wheels back this week (getting recoated) but I believe I have that size with PS4s in back.
Here are pics of them.
http://strassewheels.com/case/mercede-benz-amg-gt/

What are your rear offsets? Any rubbing with the 305's in the back?

Feb 28, 2019 | 07:02 PM

AMG 17GT

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R Nine T

Your talking about 10mm from stock 295, so it’s really not a big deal.

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Feb 28, 2019 | 08:43 PM

AMG 17GT

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R Nine T

Well you’ll be happy to know the P4S is a lot more square and beefy than the SS, tire to tire.

Feb 28, 2019 | 10:20 PM

#10

Southpaw07

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From: OH

2017 Audi R8 V10 Plus

Quote:

Originally Posted by AMG 17GT

Well you’ll be happy to know the P4S is a lot more square and beefy than the SS, tire to tire.

Interesting... And you're totally correct. The 4S has that rim protector that makes them slightly beefier. More squared shoulders too.. I haven't had any experience with them though. Seems like they'd be a better street option. I have track experience with the cup 2's on my Porsche so familiarity is what makes me lean towards them. I know they're not the greatest street tires though.. they need to be heated up to be sticky. The 4S also seems better in the rain.. Just don't know how they compare in grip. Maybe this is the time to try them.. Slightly better price too.

Mar 1, 2019 | 01:15 AM

#11

AMG 17GT

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R Nine T

Where I used to burn through first gear after 5k in SS, 305 PS4s hook up immediately when warm.

Tires are a lot quieter as well.

Mar 1, 2019 | 07:00 PM

#12

ronac

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AMG GTS

275/35/19 Sport cup 2's up front on 19x10 wheels.
325/30/20 Sport cup 2's in the rear on 20x12.5 wheels.

Mar 1, 2019 | 11:58 PM

#13

Case1906

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From: DMV

AMG GTBS, AMG GTR Pro, AMG GT, C63 AMG, Porsche Panamera 4S, RX-7 FC Turbo II

To go one step further 315/30/20 tires should fit the stock rear 20x11 wheel for some tires. For example the wheel size range listed by Toyo for 315/30/20 R888Rs is 10.5-11.5" with the design rim width being 11". Mich PSS range is 10.5 to 12" with the design also being 11" Unfortunately it doesn't look like PS Cup 2's are made in that size. Of course the next question is whether there would be rubbing for GT/GTS.

Mar 2, 2019 | 12:03 AM

#14

Case1906

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AMG GTBS, AMG GTR Pro, AMG GT, C63 AMG, Porsche Panamera 4S, RX-7 FC Turbo II

Quote:

Originally Posted by ronac

275/35/19 Sport cup 2's up front on 19x10 wheels.
325/30/20 Sport cup 2's in the rear on 20x12.5 wheels.

Ronan-Looks good, would love to see a side pic as well. Are you stock ride height and have you experience any rubbing with the your 325's in the rear?

Last edited by Case1906; Mar 2, 2019 at 05:06 PM.

Mar 2, 2019 | 12:43 AM

#15

ronac

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AMG GTS

It's lowered on KW HAS springs. I just got the wheels on so I haven't driven it around yet so unsure about rubbing. There's still snow around so it might be another few weeks. I'll keep everyone posted. It's definitely a tight fit.

I'll get some side pics tomorrow.

Mar 2, 2019 | 07:46 PM

#16

ronac

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AMG GTS

Profile shot. Bumper is off because I'm wrapping the grille.

Mar 3, 2019 | 12:14 AM

#17

thecutter64

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2018 Solarbeam Yellow AMG GTS

Are those Signature wheels?
what are the offsets if you don’t mind sharing ?

Mar 3, 2019 | 12:18 AM

#18

ronac

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AMG GTS

They're BC forged. I don't mind sharing the offset but I'd like to confirm there's no rubbing first.

Mar 3, 2019 | 05:42 PM

#19

Bijan Kohan

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From: West LA

2016 GTS; 2021 G63; 2015 Range Rover Supercharged

So on the stock 20” rear wheels (forged mesh wheels) 315/30’s are the best way to go for ultimate traction? Would 315’s fit in the stock rear wheels?

thanks for the help.

Mar 3, 2019 | 08:16 PM

#20

Rausky

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From: Charlotte, NC

AMG GT S

I have 315s on the stock 20 inch wheel. Toyo R888Rs. Still plenty of space left, never any rubbing issues.

Mar 3, 2019 | 08:36 PM

#21

N-4Speed

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From: Dallas

18 Avent. S, 18 GTS, 17 Cali T, 20 C8, 20 M850

Quote:

Originally Posted by ronac

275/35/19 Sport cup 2's up front on 19x10 wheels.
325/30/20 Sport cup 2's in the rear on 20x12.5 wheels.

Yourdiffuser looks awesome! Is it RW Carbon?

Mar 3, 2019 | 10:07 PM

#22

Southpaw07

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From: OH

2017 Audi R8 V10 Plus

Quote:

Originally Posted by Rausky

I have 315s on the stock 20 inch wheel. Toyo R888Rs. Still plenty of space left, never any rubbing issues.

Have a pic from the rear? I ran Toyo R888R's on my 997 and they were LOUD.

Mar 3, 2019 | 10:46 PM

#23

Rausky

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From: Charlotte, NC

AMG GT S

They are very loud. Not recommended if you daily or use it as GT car. The traction they provide is insane though, even at 650HP I don't get any wheelspin.