[RS777]

I have to start by saying I never knew there could be a difference between oem and aftermarket tyres of the same brand and model.

This test shows a more track focused version of the MS4S which took 2.5 years to develop. Strangely they compared the drive to the cup 2 tyre so why not just fit cup 2 in the first place? 😳

https://m.youtube.co...h?v=COA630Juf_U

[RS3Dell]

I have to start by saying I never knew there could be a difference between oem and aftermarket tyres of the same brand and model.

This test shows a more track focused version of the MS4S which took 2.5 years to develop. Strangely they compared the drive to the cup 2 tyre so why not just fit cup 2 in the first place?

https://m.youtube.co...h?v=COA630Juf_U

Stu.

The easy answer is the Cup 2s are a track day tyre with the corresponding narrow operating window off performance, not a daily drive tyre unlike the MPS4s.

The MPS4s your referring to was particularly designed for the chassis dynamics off the M3.

Dell.

Edited by RS3Dell, 31 May 2021 - 06:33 AM.

[flybynite]

I bought and fitted the PS4S partly for the reasons he did not like the standard tyre in that test. If Michelin follow his recommendations, I would be less likely to fit them on the FL RS3, its a personal preference. I bought the Michelin to reduce the nervousness in the suspension and steering over rough roads but still keeping the grip and steering feel. That is exactly what it has done. From the PFL I think the weight reduction in the FL has made the steering and handling a bit more nervous. 

 

The problem with the OEM tyres is that they are not often revised. The RO2 is an old design now and newer tyres will offer better performance through simple advance in technology. A tyre developed for the 8p and PFL cannot be perfect for the FL. The fact that there is no RO3 for the FL tells me there is no interest in evolving the tyre.

 

The only reason I may be tempted to use the RO1/O2 is on the PFL because those massive 'rim protectors' are sometimes used to beef up the sidewall with heavy weight and cornering forces. If you watch the videos of the tyre movement against the rim it is easy to see how that wedge of rubber would support the rim by brute force during cornering but I doubt the difference will be felt anywhere other than the Nürburgring. 

 

As far as the M3 goes, it is the same as the RS3 in as much as it is a car designed to be driven daily. With something like a McLaren or a GT3 there is an implied understanding that it will try and kill you on occasion so it is OK to fit track orientated tyres 

[RS3Dell]

I bought and fitted the PS4S partly for the reasons he did not like the standard tyre in that test. If Michelin follow his recommendations, I would be less likely to fit them on the FL RS3, its a personal preference. I bought the Michelin to reduce the nervousness in the suspension and steering over rough roads but still keeping the grip and steering feel. That is exactly what it has done. From the PFL I think the weight reduction in the FL has made the steering and handling a bit more nervous. 
 
The problem with the OEM tyres is that they are not often revised. The RO2 is an old design now and newer tyres will offer better performance through simple advance in technology. A tyre developed for the 8p and PFL cannot be perfect for the FL. The fact that there is no RO3 for the FL tells me there is no interest in evolving the tyre.
 
The only reason I may be tempted to use the RO1/O2 is on the PFL because those massive 'rim protectors' are sometimes used to beef up the sidewall with heavy weight and cornering forces. If you watch the videos of the tyre movement against the rim it is easy to see how that wedge of rubber would support the rim by brute force during cornering but I doubt the difference will be felt anywhere other than the Nürburgring. 
 
As far as the M3 goes, it is the same as the RS3 in as much as it is a car designed to be driven daily. With something like a McLaren or a GT3 there is an implied understanding that it will try and kill you on occasion so it is OK to fit track orientated tyres 

There is another option which is to increase the tyre pressure a bit to stiffen the sidewalls as I've done without any penalties on how the tyre wears.

Dell.

[RS3Dell]

I have to start by saying I never knew there could be a difference between oem and aftermarket tyres of the same brand and model.

This test shows a more track focused version of the MS4S which took 2.5 years to develop. Strangely they compared the drive to the cup 2 tyre so why not just fit cup 2 in the first place?

https://m.youtube.co...h?v=COA630Juf_U

Stu.

https://youtu.be/aMv64liOqIE

Dell.

[RS777]

Stu.

https://youtu.be/aMv64liOqIE

Dell.

Hi Dell,

 

Yes I saw this and the reason I bought the Cup 2 245/30/20s for my new wheels. I don't need to drive in the wet and if I did on a rare occasion I would never go fast or drive anywhere near the limits of any tyres. For me it is all about getting the power down, especially since going for more power.