[voxy]

I have recently purchaed a CPO 2021 M550ix with DHP. The car came with OEM 19" all-season tires. While i love the torque and power of the car, i feel that it is not handling as crip as i expected. Let me explain what i mean by handling. The dynamic suspension is very good in terms of body roll and stifness. I feel that the car corners quite good. The rear steering helps, but the steering feels numb and is not crip or quick. Especially when you exit out of corner you have to steer it out of the corner as opposed to the car/LSD doing most of the work for you. Here i am for example comparing to my son's Panemara (base). In other words one could say that the car suffers from understeer.

In sports mode, i feel that the steering is made just havier and feedback is still muted and undsteer is still there.

The question is this becuase of the 19" tires or this is expected behavior. If i have to move to 20" then what are the suggestions for wheels and tires?

[iamcc88]

As someone who shopped the Panamera against the M550, what you’re describing is exactly the difference between the two cars in my opinion.

Not saying wheels and tires won’t help but at the end of the day, the Panamera is going to always feel better in this sense.

[Gautam]

Exactly what @iamc88 said…you should get the best tires within reach, consensus being some Michelin pilot sport, with some debate around which one and star marked or not.

But what you’re describing is the character of the car and Porsche simply does it better. I know exactly what you mean by having to steer it out of a corner. Some people upgrade to sway bars from the M5, but it still won’t be close.

[HerkHealer]

My car came with 20s and Goodyear Runflats (they suck).
Putting 4 new PS4S tires on made a Huge difference everywhere.

[Joe-BMW33]

What you are describing to me reads similar to folks that have DHP and don’t love what it brings to the table. Many who have it that don’t like it describe it as a magic carpet ride where the driver loses feel for the road and keeping the steering in touch with the driver and the road. There are many people that love the softness or looseness (for lack of a better word) and how nimble it can feel when cornering. It’s seems it’s one of those options you either love or underwhelmed with. Moving to 20’s will not help with what you are describing. But summer non flat rubber will perform better over your run flat 19’s, but the steering thing and crispness as you describe it will not magically appear.

I don’t have it, but have driven cars with it. I’m 50/50 on it and if I had it, it wouldn’t be the end of the world, but I don’t think it’s a must have for me.

[Gautam]

Originally Posted by Joe-BMW33

What you are describing to me reads similar to folks that have DHP and don’t love what it brings to the table. Many who have it that don’t like it describe it as a magic carpet ride where the driver loses feel for the road and keeping the steering in touch with the driver and the road. There are many people that love the softness or looseness (for lack of a better word) and how nimble it can feel when cornering. It’s seems it’s one of those options you either love or underwhelmed with. Moving to 20’s will not help with what you are describing. But summer non flat rubber will perform better over your run flat 19’s, but the steering thing and crispness as you describe it will not magically appear.

I don’t have it, but have driven cars with it. I’m 50/50 on it and if I had it, it wouldn’t be the end of the world, but I don’t think it’s a must have for me.

I’ve driven both with and without dhp, and a panny gts. It’s almost splitting hairs between the m550’s, the Porsche is in a different league, it just takes a lot less “effort”. Close to the f90 I assume, but ignorance is bliss.

[Neusser]

Originally Posted by voxy

I have recently purchaed a CPO 2021 M550ix with DHP. The car came with OEM 19" all-season tires. While i love the torque and power of the car, i feel that it is not handling as crip as i expected. Let me explain what i mean by handling. The dynamic suspension is very good in terms of body roll and stifness. I feel that the car corners quite good. The rear steering helps, but the steering feels numb and is not crip or quick. Especially when you exit out of corner you have to steer it out of the corner as opposed to the car/LSD doing most of the work for you. Here i am for example comparing to my son's Panemara (base). In other words one could say that the car suffers from understeer.

In sports mode, i feel that the steering is made just havier and feedback is still muted and undsteer is still there.

The question is this becuase of the 19" tires or this is expected behavior. If i have to move to 20" then what are the suggestions for wheels and tires?

It will understeer as you approach the limits of grip, as the V8 is nose-heavy, like an Audi (Germans call them Nasenbären).

You could bump the front tire width up a bit, as they've done with the M5. Or adjust your driving.

There is only so much you can do where basic chassis physics are concerned in this case.

[Neusser]

Originally Posted by HerkHealer

My car came with 20s and Goodyear Runflats (they suck).
Putting 4 new PS4S tires on made a Huge difference everywhere.

The Goodyears are actually a decent tire. The key is to run them at Goodyear's pressures.

Michelin has manufacturer pressues in line with the BMW half-load pressures, so if you follow the BMW door-sill chart, they should work.

F1s need about a half bar less, or they are hard, disconnected, and floaty. Makes a world of difference, and you can verify it on the treadface. I'm actually looking at going F1 Supersport for my next set; some of the German tests have placed them ahead of the Michelins and there are good deals on them here.

[G30M]

Originally Posted by Neusser

The Goodyears are actually a decent tire. The key is to run them at Goodyear's pressures.

Michelin has manufacturer pressues in line with the BMW half-load pressures, so if you follow the BMW door-sill chart, they should work.

F1s need about a half bar less, or they are hard, disconnected, and floaty. Makes a world of difference, and you can verify it on the treadface. I'm actually looking at going F1 Supersport for my next set; some of the German tests have placed them ahead of the Michelins and there are good deals on them here.

do you mean F1 Supercar?

[Joe-BMW33]

Originally Posted by Gautam

I’ve driven both with and without dhp, and a panny gts. It’s almost splitting hairs between the m550’s, the Porsche is in a different league, it just takes a lot less “effort”. Close to the f90 I assume, but ignorance is bliss.

For sure, I should have added that a Panera or any Porsche is on an entirely different level in terms of handling than pretty much any BMW.

[G30M]

Originally Posted by voxy

I have recently purchaed a CPO 2021 M550ix with DHP. The car came with OEM 19" all-season tires. While i love the torque and power of the car, i feel that it is not handling as crip as i expected. Let me explain what i mean by handling. The dynamic suspension is very good in terms of body roll and stifness. I feel that the car corners quite good. The rear steering helps, but the steering feels numb and is not crip or quick. Especially when you exit out of corner you have to steer it out of the corner as opposed to the car/LSD doing most of the work for you. Here i am for example comparing to my son's Panemara (base). In other words one could say that the car suffers from understeer.

In sports mode, i feel that the steering is made just havier and feedback is still muted and undsteer is still there.

The question is this becuase of the 19" tires or this is expected behavior. If i have to move to 20" then what are the suggestions for wheels and tires?

Michelin Pilot Sport 4 / 5 / 4S -255-40-19 square all round

19" is not your problem

[Neusser]

Originally Posted by g21

do you mean F1 Supercar?

Wut?

https://www.goodyear.eu/de_de/consum...AGF1SUPSP.html

[Joe-BMW33]

Originally Posted by g21

do you mean F1 Supercar?

Don’t bother. It’s more than you wanted to know even if it’s accurate.

[G30M]

Originally Posted by Neusser

Wut?

https://www.goodyear.eu/de_de/consum...AGF1SUPSP.html

ah i see.

i was looking at these https://www.goodyear.com/en_US/tires...percar/58.html

but couldn't find any useful reviews and then i realised they are track tires and not for me anyhow

[G30M]

Originally Posted by Joe-BMW33

Don’t bother. It’s more than you wanted to know even if it’s accurate.

well some local company is clearing out the Supercar G2 at apparently 90% off and i was doing research but couldn't find anything other than they're track tires and they're not for me. will stick to the trusted Pilot Sport series. they just work for me roads and my driving style.

https://www.hyperdrivedealer.co.nz/p...ercar-g2-right

[G30M]

Originally Posted by Gautam

I know exactly what you mean by having to steer it out of a corner. Some people upgrade to sway bars from the M5, but it still won’t be close.

can you explain this bit? i have the 550, DHP, 20" staggered (Pirellis). (once that's worn i will go to Michelins at 255 40 19 - they are wide tires, just about as wide as the 275s on the pirellis which are only 240mm wide on the tread. i measured the 245 pirelli front and they're only 200mm wide on the tread!

i turn it in the corner, something weird happens, it comes out of the corner faster than i ever can dare to do with my M340i.

but i don't have the need to steer it out of the corner?

[Neusser]

Originally Posted by g21

ah i see.

i was looking at these https://www.goodyear.com/en_US/tires...percar/58.html

but couldn't find any useful reviews and then i realised they are track tires and not for me anyhow

Ah. Yeah.

My mechanic is a BMW guy and recommended the F1 Supersports over the PS4s.

He does about 30-40 laps on the Nürburgring per year and is a semi-pro driver. He claims that Goodyear has stiffer sidewalls and often work better for most sport applications.

I have become a convert. Had PS4s (non S) on my old Merc and was not all that impressed in the dry on the roads I drive most often.

[G30M]

Originally Posted by Neusser

Ah. Yeah.

My mechanic is a BMW guy and recommended the F1 Supersports over the PS4s.

He does about 30-40 laps on the Nürburgring per year and is a semi-pro driver. He claims that Goodyear has stiffer sidewalls and often work better for most sport applications.

I have become a convert. Had PS4s (non S) on my old Merc and was not all that impressed in the dry on the roads I drive most often.

got it. sidewalls matter. but i like comfort so i will like Michelins. i don't live near the Nurburgring unfortunately. i have a track nearby but i have to sell my kidney to get in there. maybe i need to know someone who knows someone.

[Neusser]

Originally Posted by g21

got it. sidewalls matter. but i like comfort so i will like Michelins. i don't live near the Nurburgring unfortunately. i have a track nearby but i have to sell my kidney to get in there. maybe i need to know someone who knows someone.

Comfort can be good, too. My 47-year-old ass has slowly started to appreciate it a bit.

[Gautam]

Originally Posted by g21

can you explain this bit? i have the 550, DHP, 20" staggered (Pirellis). (once that's worn i will go to Michelins at 255 40 19 - they are wide tires, just about as wide as the 275s on the pirellis which are only 240mm wide on the tread. i measured the 245 pirelli front and they're only 200mm wide on the tread!

i turn it in the corner, something weird happens, it comes out of the corner faster than i ever can dare to do with my M340i.

but i don't have the need to steer it out of the corner?

It's not an issue with power delivery. I'd describe it like this, it can enter a hairpin with enthusiasm, but is unforgiving about exiting it. You have to be really deliberate about taking sharp turns at high speeds. It definitely doesn't have that "on rails" feeling. I've never driven an M340i, but the F8x is much more forgiving in such scenarios.

[iamcc88]

Originally Posted by g21

got it. sidewalls matter. but i like comfort so i will like Michelins. i don't live near the Nurburgring unfortunately. i have a track nearby but i have to sell my kidney to get in there. maybe i need to know someone who knows someone.

One suggestion I have, try putting your car in the “dynamic traction” mode. You press the traction control button a single time, as opposed to holding it down which truly turns traction control “off”.

I believe that dynamic traction mode makes my car feel better in corners, so I’m curious if you notice any difference.

[G30M]

Originally Posted by Gautam

It's not an issue with power delivery. I'd describe it like this, it can enter a hairpin with enthusiasm, but is unforgiving about exiting it. You have to be really deliberate about taking sharp turns at high speeds. It definitely doesn't have that "on rails" feeling. I've never driven an M340i, but the F8x is much more forgiving in such scenarios.

i see. you have DHP too?
if so must be something to do with rear wheel steering.

i haven't tried sharp turns at high speed.