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      01-15-2021, 06:07 PM   #23
KoenG
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Quote:
Originally Posted by solstice View Post
Some wide angle but not fish eye for sure. But you are right if you look at front vs front of the two tires. However if you focus at the area were the two tires meet distortion is insignificant (front of F8X tire vs rear of the G8X tire) and there is still a very big difference.

I have 255s so for me all this extra contact area will be valid
Hm, 275 is 8% wider than 255mm. The video suggest way more. Also, choosing another set of tires is not really discussing the architecture of the vehicle. I agreed they started with the weight, but now they want to distract us with important, but not fundamental stuff. I mean, you can put wide pilot sport cup tires on a suzuki probably also.
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      01-15-2021, 06:20 PM   #24
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Quote:
Originally Posted by KoenG View Post
Hm, 275 is 8% wider than 255mm. The video suggest way more. Also, choosing another set of tires is not really discussing the architecture of the vehicle. I agreed they started with the weight, but now they want to distract us with important, but not fundamental stuff. I mean, you can put wide pilot sport cup tires on a suzuki probably also.
More is better when it comes to information IMO. I don’t think any information in these videos is distracting at all, quite the opposite. Speculation has been rampant here due to lack of this type of information.

I hope we get more.
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      01-15-2021, 06:26 PM   #25
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Quote:
Originally Posted by solstice View Post
More is better when it comes to information IMO. I don’t think any information in these videos is distracting at all, quite the opposite. Speculation has been rampant here due to lack of this type of information.

I hope we get more.
I don't disagree, but I would rather see torsional stiffness, engine dynamic behaviour, vehicle dynamics wrt understeer. With all respect for the clip, but we could have also made it in a couple of hours, not?
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      01-15-2021, 06:28 PM   #26
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Quote:
Originally Posted by KoenG View Post
I don't disagree, but I would rather see torsional stiffness, engine dynamic behaviour, vehicle dynamics wrt understeer. With all respect for the clip, but we could have also made it in a couple of hours, not?
Hopefully those areas are still to come.
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      01-15-2021, 06:39 PM   #27
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Love these videos. Since this gen isn’t really a looker, it makes you appreciate the car a little more to understand all the technical aspects.
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      01-15-2021, 06:49 PM   #28
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Quote:
Originally Posted by solstice View Post
More is better when it comes to information IMO. I don’t think any information in these videos is distracting at all, quite the opposite. Speculation has been rampant here due to lack of this type of information.

I hope we get more.
Fully agree
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      01-15-2021, 06:50 PM   #29
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Originally Posted by SYT_Shadow View Post
I'm also looking forward to the reviews!
Yes, unfortunately the season coupled with COVID isn’t ideal for the European reviewers when it comes to wringing one out at the track. The only weather option is Southern Europe and I’m not sure if tracks are open and what travel restrictions are within the EU.

In the US however I see no real issues with it so hopefully very soon.
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      01-15-2021, 07:02 PM   #30
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Hmm....305’s squared.
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      01-15-2021, 07:14 PM   #31
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Quote:
Originally Posted by KoenG View Post
I don't get the argument of heat dissipation at all. Bigger rims evaquate more heat. The higher side wall on the front end is common sense: it makes the dynamic behaviour (mainly understeer) of the front less snappy. Nevertheless a pro driver would probably prefer lower side walls for more traject precision. They optimised it for the occasional track hero I guess.
I did find it interesting and intriguing. It is not something I have read about before (and did read a lot about tires). I will definitely be giving it more thought.
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      01-15-2021, 07:37 PM   #32
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Quote:
Originally Posted by KoenG View Post
I mean, you can put wide pilot sport cup tires on a suzuki probably also.
You could but as we learn from the more quality brands performance divisions they spend some effort and science into balancing and tuning the factory wheel and tire front and rear combinations. I.e. that we now get these wide front tires from the factory is significant IMO and I’m confident it will be noticeable. Another good thing is that by offering optional Cup 2s from the factory vs. slapping them on a Suzuki is that we know the car is engineered and warranted to take the additional forces.

We are mainly talking about the standard 275s but there’s even the 285s in the performance range. That’s quite a beastly tire up front compared to historic factory M3 offerings. Even the M4 GTS wear 265s.

Last edited by solstice; 01-15-2021 at 08:19 PM..
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      01-15-2021, 07:48 PM   #33
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Originally Posted by clutchdj View Post
Hmm....305’s squared.
This for me is one of the big questions regarding the G8X: what max tire front and rear can it fit?

305 square in 11" wheels would be quite nice
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      01-15-2021, 07:51 PM   #34
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Now I’m curious if the M5CS will have staggered wheels to gain the same advantages.
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      01-15-2021, 07:52 PM   #35
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No matter what size tire, if you're not using Michelin PSS's or Togo Proxes you shouldn't be driving a BMW. I went to Hankook Evo 2's to save a few bucks one time, when I went back to Michelin PSS's it was like I got a suspension upgrade.

Do yourself a favor and never consider anything else
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      01-15-2021, 07:55 PM   #36
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255? My M4 has 265s. What am I missing?
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      01-15-2021, 08:00 PM   #37
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I appreciate BMW putting out a video to explain some of the logic behind their choices, but it's a bit generalized. Nothing new offered here that track day guys haven't known for decades. At least BMW is somewhat getting with the program for that class of BMW owners - even though the Cup 2s are still not really track tires.
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      01-15-2021, 08:09 PM   #38
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Quote:
Originally Posted by ///M4TT View Post
255? My M4 has 265s. What am I missing?
That the non competition car came with 255s. And at launch there was no competition F8X.
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      01-15-2021, 08:23 PM   #39
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Quote:
Originally Posted by nicky dj View Post
No matter what size tire, if you're not using Michelin PSS's or Togo Proxes you shouldn't be driving a BMW. I went to Hankook Evo 2's to save a few bucks one time, when I went back to Michelin PSS's it was like I got a suspension upgrade.

Do yourself a favor and never consider anything else
Many years ago I used a set of hankook v12s on my e46 m3, horrible decision. Michelin from then on, never looked back
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      01-15-2021, 08:25 PM   #40
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Quote:
Originally Posted by dvas View Post
I appreciate BMW putting out a video to explain some of the logic behind their choices, but it's a bit generalized. Nothing new offered here that track day guys haven't known for decades. At least BMW is somewhat getting with the program for that class of BMW owners - even though the Cup 2s are still not really track tires.
Unfortunately in Europe you don't have many choices for track tires, so unless you have the $ for a full slick tire you're basically going to run the psc2

As a consolation prize the psc2 is cheaper there
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      01-15-2021, 08:51 PM   #41
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Quote:
Originally Posted by solstice View Post
Now I’m curious if the M5CS will have staggered wheels to gain the same advantages.
I believe it's been pretty much confirmed that the M5cs is only getting the 20" 789M wheels already offered as an option on the M5/M5competition albeit in gold colour and shod with PZCorsa tires (at least not in the US for the latter).
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      01-15-2021, 08:55 PM   #42
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Quote:
Originally Posted by CanAutM3 View Post
I believe it's been pretty much confirmed that the M5cs is only getting the 20" 789M wheels already offered as an option on the M5/M5competition albeit in gold colour and shod with PZCorsa tires (at least not in the US for the latter).
You’re right, I remember seeing that. Looks great but surprising they didn’t go for staggered. Maybe something to do with AWD dynamics so mkoesel’s question might have some merits, what do you think?
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      01-15-2021, 09:23 PM   #43
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I wonder if the AWD models get the same tire size.

So they just put the rear tire out of F80 into G8X, cool. Wider tire= More prone to hydroplane. I hope wider tire doesn't mean they sucked the last remaining fun/communication out of EPS. Also, I hope they left some playfulness in the rear as "smaller sidewall in the rear aids stiffness/stability" got me worried.
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      01-15-2021, 10:10 PM   #44
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Great video, very informative.

Now what the F are these beautiful colors? Brooklyn and oxide?
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