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Discussion Starter · #1 ·
Hi, We can't get the PS4S tyre in 18" for the rear 245/35 size wheel but we can now get it in the 225/40 18" size for the front. I would like a bit more dynamic steering feel on the front compared to the PS4 tyres I have now. The Original Pilot Super Sports had this but are not great in colder or wet weather. Could I fit PS4S on the front and PS4 on the rear? The tread pattern is the same, the main difference between the tyres is rubber compound on the outer shoulder and wall stiffness. I imagine this might be ok but have always been careful to match tyres all round for best handling. Ideally I'd like to put the new Continental SportContact 7 tyres (excellent reviews) on all round but of course they don't make them in the rear tyre size! Closest is 255/35 for the rear which is wider than standard. Thanks for any advice.
 

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My car is poor with PS4 F & PS5 R. Dodgy handling over 50mph, even though the tread pattern is identical. I won’t be mixing again.
 

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Discussion Starter · #3 ·
My car is poor with PS4 F & PS5 R. Dodgy handling over 50mph, even though the tread pattern is identical. I won’t be mixing again.
Tread pattern on PS4 is different to PS5, they're really not the same tyre. I'm not interested in the PS5 as it's no better than PS4 in terms of dynamic steering feel
 

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If you are only going to consider the exact configuration you propose it is likely to be a very small set of people.

I think the wider point made by 120 is that they were unimpressed with their mixed set.

This is regularly raised.

I had F1 ASSY 4 on the rears and MPSS on the front for a while. It felt very odd from the front "floaty" and the TC definitely didn't like it.

I also briefly had ASSY 5 on front with ASSY 4 rear. That was odd too.

Universally folk raising it don't like it. (But that's hardly surprising, nobody mixing is likely to post that it's ok to them.)

I do end up mixing at each change, for cost. I personally wouldn't fit anything I couldn't match to later.
 

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Discussion Starter · #5 ·
If you are only going to consider the exact configuration you propose it is likely to be a very small set of people.

I think the wider point made by 120 is that they were unimpressed with their mixed set.

This is regularly raised.

I had F1 ASSY 4 on the rears and MPSS on the front for a while. It felt very odd from the front "floaty" and the TC definitely didn't like it.

I also briefly had ASSY 5 on front with ASSY 4 rear. That was odd too.

Universally folk raising it don't like it. (But that's hardly surprising, nobody mixing is likely to post that it's ok to them.)

I do end up mixing at each change, for cost. I personally wouldn't fit anything I couldn't match to later.
Thanks for the reply. I would definitely agree that mixing tyres front and rear is not advisable if you care about good handing and performance nearer the limits. However the PS4S is the same tread pattern as the PS4, it's basically a PS4 with stiffer side walls and different compound on the outer shoulder to help with track use and harder driving. That's why I wondered if it might work? I suspect someone has tried PS4S front PS4 rear due to lack of availability of PS4S for the rear wheels.
 

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The above was easy to find. Loads of threads. Though to be honest the average reply is "it'll probably be alright, but sime don't mix well".

If the fronts are stiffer that could possibly upset the yaw sensor which could excite the DSC a bit.

If you do do it please report back either way.

Trying to keep matched tyres is a right pain given how quickly brands and models change
 

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If you are only going to consider the exact configuration you propose it is likely to be a very small set of people.

I think the wider point made by 120 is that they were unimpressed with their mixed set.

This is regularly raised.

I had F1 ASSY 4 on the rears and MPSS on the front for a while. It felt very odd from the front "floaty" and the TC definitely didn't like it.

I also briefly had ASSY 5 on front with ASSY 4 rear. That was odd too.

Universally folk raising it don't like it. (But that's hardly surprising, nobody mixing is likely to post that it's ok to them.)

I do end up mixing at each change, for cost. I personally wouldn't fit anything I couldn't match to later.
That was exactly the point, mixing tyres of any sort on these cars causes problems. I don’t like the PS5 so far, so would not recommend them.
 

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Thanks for the reply. I would definitely agree that mixing tyres front and rear is not advisable if you care about good handing and performance nearer the limits. However the PS4S is the same tread pattern as the PS4, it's basically a PS4 with stiffer side walls and different compound on the outer shoulder to help with track use and harder driving. That's why I wondered if it might work? I suspect someone has tried PS4S front PS4 rear due to lack of availability of PS4S for the rear wheels.
They very well be the same tread pattern but that’s about the extent of the similarities. The 4s has different tread compound make up to the PS4. There was a lot of guys having issues with TC intervening even on light throttle on RS3’s with 4s in the 255/235 staggered fitment. So much so Blackcircles (owned by Michelin) started to decline sales if there were going on an RS3. Slightly different situation going on an AWD car but it also highlights how slight differences can cause unforeseen issues. Personally I would never mix tyre models. The compound alone could cause grip or traction imbalance not to mention the sidewall differences. Running a tyre with a stiffer side wall on one axle and softer on the other could promote a more vague floaty handling characteristic, something the F20/21 chassis doesn’t need help with.
 

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Discussion Starter · #9 ·
Thanks MarcmacRS, I contacted Mchelin about this and not being able to fit 4S tyres all round due to lack of availability for the rear sizes. They responded quite quickly with "Regarding your inquiry about the possibility to fit Michelin Pilot Sport 4S tyres on the front and Michelin Pilot Sport 4 tyres on the rear of your BMW, I must inform you, that Michelin do not recommend fitting different tyre models front and rear, as this can affect the performance of the tyres." So that's me told, won't be doing that. They have offered to suggest the best tyre for my car if I answer a few questions about my vehicle so I will do that and post their suggestion on here. I suspect they will recommend original fitment Pilot SuperSports or maybe PS5 all round. Neither of those appeal but we'll see what they come back with.
 

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That was exactly the point, mixing tyres of any sort on these cars causes problems. I don’t like the PS5 so far, so would not recommend them.
I’m so glad I sent my ps5 back and ordered some ps4 for my rears (thanks OneTwenty) . I’m running a 245/255 ps4 set up and find they grip really well in the cold and wet.
 

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Discussion Starter · #11 ·
I’m so glad I sent my ps5 back and ordered some ps4 for my rears (thanks OneTwenty) . I’m running a 245/255 ps4 set up and find they grip really well in the cold and wet.
So you're happy with PS4 all round? I have them on my M240i (Std 18" wheels, Bilstein B8 shocks, Eibach lowering springs and 15mm spacers) and like the all weather grip they have but find the fronts a little numb in dry weather compared to the old Pilot SuperSports. Better all round tyre though, seems you can't have it all in one tyre. Apparently the Conti SportContact 7 tyre is excellent and feels dynamic (according to Jon @ TyreReviews) but can't get rear 18" tyre size for mine.
 

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Yeah I really like them.
So you're happy with PS4 all round? I have them on my M240i (Std 18" wheels, Bilstein B8 shocks, Eibach lowering springs and 15mm spacers) and like the all weather grip they have but find the fronts a little numb in dry weather compared to the old Pilot SuperSports. Better all round tyre though, seems you can't have it all in one tyre. Apparently the Conti SportContact 7 tyre is excellent and feels dynamic (according to Jon @ TyreReviews) but can't get rear 18" tyre size for mine.
Yeah, I’m really impressed with them. There the only tyre I’ve had so can’t comment on others 👍
 

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Appreciate my car is a little older and has less torque than you're dealing with, but I currently have normal PS4s on the front and PS5s on the back. Handling is absolutely fine, although I've gone to 225/255 on mine as a) tyres are easier to find and b) the speedo is more accurate with the slightly taller tyres. For a while I had PSS on the back as that's all Michelin could supply, and whilst it was amsuingly pointy it wasn't great during conditions like we have now.

I'm finding the PS5s perform very similarly to the 4s but are much quieter on the motorway, and not sure the last time I saw the yellow light on the dash light up since I fitted the 5s.
 

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Both the PS4S and SC7 are available in 235/40 R18 which fit the front and rear OEM rims.

Could be combined with 265/30 R19 rears in line with a dual rim size setup of the latest M cars.
 

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Discussion Starter · #15 ·
Both the PS4S and SC7 are available in 235/40 R18 which fit the front and rear OEM rims.

Could be combined with 265/30 R19 rears in line with a dual rim size setup of the latest M cars.
Do you think going 10mm narrower (235 instead of 245) on my rear OEM 18 inch wheels is OK? Car runs 420bhp and 540Nm torque so rear traction can be an issue. I had considered going 10mm wider on the rear using 255 tyres but have been advised against it on the forum.
 

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With stock power I have no issues putting the power down with a square 235/40 CC2 setup, gave it full beans after rub in last week and the traction light stayed off and the car tracked nice and straight. If the CC2 can handle 340hp / 500Nm the UUHP tyres should be able to handle your specs. Please be aware I have xDrive so results might vary with RWD.

But why not go for a dedicated 19 inch summer set with multiple UUHP choices for 245/255 or 235/265 rubber?

In 18 inch the Asy 6 performs very well btw, in this review its close in the dry to the SC7 but beats it in the wet:
 

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Discussion Starter · #17 ·
With stock power I have no issues putting the power down with a square 235/40 CC2 setup, gave it full beans after rub in last week and the traction light stayed off and the car tracked nice and straight. If the CC2 can handle 340hp / 500Nm the UUHP tyres should be able to handle your specs. Please be aware I have xDrive so results might vary with RWD.

But why not go for a dedicated 19 inch summer set with multiple UUHP choices for 245/255 or 235/265 rubber?

In 18 inch the Asy 6 performs very well btw, in this review its close in the dry to the SC7 but beats it in the wet:
Thanks Bimmert. Rear traction will be much more of an issue for me than your X-drive setup, your front wheels can pull to avoid the rears being over stressed for traction. Getting a set of 19 inch wheels is an option but I think the ride would be too harsh on my passive suspension setup now I have the B8 shocks and lowering springs fitted. I know they're OK with adaptive suspension but I prefer the passive setup and OEM black alloys. Hopefully Michelin UK will reply to me tomorrow and I'll be able to post their response for everyone to see. Fundamentally the PS4 (non S) 225/40 & 245/35 18" staggered setup I have is good for all seasons but I miss the more dynamic feel of the original Pilot SuperSports on the front in dry weather.
 

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I’m so glad I sent my ps5 back and ordered some ps4 for my rears (thanks OneTwenty) . I’m running a 245/255 ps4 set up and find they grip really well in the cold and wet.
I wish I’d stuck with the PS4. 😬

So you're happy with PS4 all round? I have them on my M240i (Std 18" wheels, Bilstein B8 shocks, Eibach lowering springs and 15mm spacers) and like the all weather grip they have but find the fronts a little numb in dry weather compared to the old Pilot SuperSports. Better all round tyre though, seems you can't have it all in one tyre. Apparently the Conti SportContact 7 tyre is excellent and feels dynamic (according to Jon @ TyreReviews) but can't get rear 18" tyre size for mine.
I loved PS4 all round on my 240, but the PS5 are rubbish in comparison. The rear no longer has the wet weather grip of the PS4, in fact it’s not much better now then the MPSS. I wouldn’t recommend them at all. If I had the cash I would go back to ps4 and ditch the new ps5 but I have to live with them now. 😢
 

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Discussion Starter · #19 ·
Strange isn't it, Jon on TyreReviews (reputable tyre review YouTube channel) rated the PS5 highly, an evolution of PS4 he reckoned. When Michelin talk about much longer life from the new PS5 tyre that surely can't translate to better grip as the rubber compound has to be harder? I'm getting good life out of my PS4 tyres, 9k miles and still over 5mm all round, they should do over 15k miles which is fine by me. There's a PS5S on the way at some point I think. Perhaps tyre reviews can be misleading unless they were done on the car you actually drive. He used a Golf GTI with 225/45 R17, nowhere near the torque levels of a 140/240 and of course fwd. Having checked the review again the new Goodyear Asymmetric 6 beat the PS5, more dynamic handling and as good as PS5 in most other areas. Maybe the Asymmetric 6 is a tyre to try? I nearly bought their F1 SuperSports when I got the PS4 tyres but was no availability of rear tyre size and couldn't wait months for them to arrive.
 

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Strange isn't it, Jon on TyreReviews (reputable tyre review YouTube channel) rated the PS5 highly, an evolution of PS4 he reckoned. When Michelin talk about much longer life from the new PS5 tyre that surely can't translate to better grip as the rubber compound has to be harder? I'm getting good life out of my PS4 tyres, 9k miles and still over 5mm all round, they should do over 15k miles which is fine by me. There's a PS5S on the way at some point I think. Perhaps tyre reviews can be misleading unless they were done on the car you actually drive. He used a Golf GTI with 225/45 R17, nowhere near the torque levels of a 140/240 and of course fwd. Having checked the review again the new Goodyear Asymmetric 6 beat the PS5, more dynamic handling and as good as PS5 in most other areas. Maybe the Asymmetric 6 is a tyre to try? I nearly bought their F1 SuperSports when I got the PS4 tyres but was no availability of rear tyre size and couldn't wait months for them to arrive.
One of the reasons I went for the PS5 was because of that review, but I also thought exactly the same at the time - how can the tyre last so much longer without affecting grip? Well it does affect grip in my experience. :cry:

On the PS4 I had a really hard time getting the car to slide or lose traction in the wet, even when they only had 2mm of tread left!! But the PS5 are rubbish in comparison - I can no longer just put my foot down when it's raining as it loses traction just as badly as when I had the MPSS fitted. Yesterday when it was raining and I was late I was pushing hard on the slip road up to the motorway and it was just fish tailing all the way up - even on the carriageway it was flashing the TC when I tried to boot it. The PS4 previously fitted never ever did that.

By far the worse tyre I've run on the 240 so far and when I have to swap next year (or sooner if I can afford to!!), I think I will go to the Good Year Asym 6 if I can't get PS4 any more. I also run PS4 on our E91 and they last 20k miles at least on that car and give endless grip with no issues. They do only last 12k miles on my 240 though but that's down to how I drive probably. :LOL:
 
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