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      12-12-2019, 05:59 PM   #1
brad850csi
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Got 285/35r20 and 325/30r20 Sport Cup 2s fitted to the car

Went with Ferrada FR8 wheels in 20x10" 25mm and 20x11.5" 18mm. I think they look great and the taller tyres fill out the guards quite well and bring the speedo up a bit, previously the car would be doing 95kmh while indicating 100kmh, now it is 97kmh at 100kmh.

No rubbing so far but haven't gone for a spirited drive yet either.
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SCOTT26 "So as an admirer of the M5 and a potential customer of an M5 Touring. I would run naked around the streets of Garching if they were to offer one."
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      12-12-2019, 10:51 PM   #2
Jasoneo5
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Nice! All that meat makes 20" look like 19"!
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      12-13-2019, 10:19 AM   #3
JohnLM6`
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Beware if tracking. This happened after two 30 minute sessions. I'm now on R888s and they can handle the load.
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      12-13-2019, 06:32 PM   #4
brad850csi
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Originally Posted by JohnLM6` View Post
Beware if tracking. This happened after two 30 minute sessions. I'm now on R888s and they can handle the load.
Ahh yep, that doesn't surprise me. I might visit the track for a short session or two but for me it really is just a set of summer tyres.
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SCOTT26 "So as an admirer of the M5 and a potential customer of an M5 Touring. I would run naked around the streets of Garching if they were to offer one."
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      12-13-2019, 06:33 PM   #5
brad850csi
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Quote:
Originally Posted by Jasoneo5 View Post
Nice! All that meat makes 20" look like 19"!
285/35r20 has a taller sidewall than the standard non M 6 series cars and is quite close to the 295/35r19 that comes stock on the rear 19" wheels on an M6 so yes you're definitely right there. That is part of the look I was going for.
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SCOTT26 "So as an admirer of the M5 and a potential customer of an M5 Touring. I would run naked around the streets of Garching if they were to offer one."
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      01-08-2020, 12:48 PM   #6
dyefremov
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Hi brad850csi! Are you on stock suspension? No fender rolling? Camber? I'm very interested in your experience because I couldn't find too many examples of people running 20x10 fronts. Your offset is very aggressive. It sticks out 12mm more compared to stock. Don't understand where you found that much room thyere :-)
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      01-08-2020, 01:17 PM   #7
brad850csi
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Quote:
Originally Posted by dyefremov View Post
Hi brad850csi! Are you on stock suspension? No fender rolling? Camber? I'm very interested in your experience because I couldn't find too many examples of people running 20x10 fronts. Your offset is very aggressive. It sticks out 12mm more compared to stock. Don't understand where you found that much room thyere :-)
Yes stock suspension. I ran M5 20x10 34mm 295/30r20 wheels and tyres at the front for about a month and had no issues which lead me in this direction.

https://www.6post.com/forums/showthread.php?t=1543272

The only thing is that at 180 degree of steering lock and when going onto an angle such as going up a parking ramp the front tyres rub slightly on the vents that are in the plastic at the front of the wheel arch. I don't think this is due to the width but more the increased height of the 285/35r20.

The Porsche Cup2 that came originally on the GT2RS is a 265/35r20 but is really wide with an 11.4" tread width vs the 285/35r20 I have which is 10.1". I might try and find some of those to fit at the start of next summer over here to see how they fit on the car.
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      01-08-2020, 04:29 PM   #8
dyefremov
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Quote:
Originally Posted by brad850csi View Post
Yes stock suspension. I ran M5 20x10 34mm 295/30r20 wheels and tyres at the front for about a month and had no issues which lead me in this direction.

https://www.6post.com/forums/showthread.php?t=1543272

The only thing is that at 180 degree of steering lock and when going onto an angle such as going up a parking ramp the front tyres rub slightly on the vents that are in the plastic at the front of the wheel arch. I don't think this is due to the width but more the increased height of the 285/35r20.

The Porsche Cup2 that came originally on the GT2RS is a 265/35r20 but is really wide with an 11.4" tread width vs the 285/35r20 I have which is 10.1". I might try and find some of those to fit at the start of next summer over here to see how they fit on the car.
Thanks for the quick reply! Based on what you said here and in the other thread there is plenty of room both inside and outside. I am wondering why 10" front is not the standard M6 fitment for aftermarket wheels? That would allow a wider range of tire options from stock 265 up to 285.

I really like the style (and price) of HRE FF15, but they don't come in a perfect size for M6. What I want to do is run 20x10 ET40 with a 10mm spacer front and 20x10.5 ET26 with a 10mm spacer rear. Based on your experiments and my math that should clear both inside and outside with enough margin. What do you think?
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      01-08-2020, 06:32 PM   #9
brad850csi
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Quote:
Originally Posted by dyefremov View Post
Thanks for the quick reply! Based on what you said here and in the other thread there is plenty of room both inside and outside. I am wondering why 10" front is not the standard M6 fitment for aftermarket wheels? That would allow a wider range of tire options from stock 265 up to 285.

I really like the style (and price) of HRE FF15, but they don't come in a perfect size for M6. What I want to do is run 20x10 ET40 with a 10mm spacer front and 20x10.5 ET26 with a 10mm spacer rear. Based on your experiments and my math that should clear both inside and outside with enough margin. What do you think?
This was about the biggest list of FF15 sizes I could find. https://www.ravspec.com/shop/hre-ff15

I'd be tempted to go with 20x10 33mm with no spacer as the top edge of the tyre will still be 3mm further out with a 275/35r20 than the stock 31mm offset wheels with a 265/35r20 tyre. However the 20x10" 40mm option would give you the ability to run a 10, 12, 15mm bolt on spacer to get the fitment where you want it to be.

Based on my rear fitment, you could do the same sort of thing with the rear and go with a bunch of different spacer options. Honestly I'd probably say buy a pair of 10mm and 15mm with those offsets and try each spacer size at the front and the rear and see how you think things look best.

There are a few threads about with people running 10mm to 15mm spacers on stock wheels which might make you think you could go with slightly larger spacers than 10mm with those offsets. Just do a search for spacer or spacers and you should find plenty of pics.
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      01-09-2020, 01:48 PM   #10
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Quote:
Originally Posted by brad850csi View Post
This was about the biggest list of FF15 sizes I could find. https://www.ravspec.com/shop/hre-ff15

I'd be tempted to go with 20x10 33mm with no spacer as the top edge of the tyre will still be 3mm further out with a 275/35r20 than the stock 31mm offset wheels with a 265/35r20 tyre. However the 20x10" 40mm option would give you the ability to run a 10, 12, 15mm bolt on spacer to get the fitment where you want it to be.

Based on my rear fitment, you could do the same sort of thing with the rear and go with a bunch of different spacer options. Honestly I'd probably say buy a pair of 10mm and 15mm with those offsets and try each spacer size at the front and the rear and see how you think things look best.

There are a few threads about with people running 10mm to 15mm spacers on stock wheels which might make you think you could go with slightly larger spacers than 10mm with those offsets. Just do a search for spacer or spacers and you should find plenty of pics.
Thanks for the suggestions! Appreciate your input.
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