Mercedes rear tyres

[SMC]

Hi

I appreciate the subject of tyres is a well discussed subject, but I have a very specific question that I can’ t seem to get an answer to and I’m hoping I may get some help with.

My P450 AWD came with P Zero 295/ 20 RZ20 AMS tyres that need replacing. I see that the Mercedes tyre variant is listed on the Pirelli site as suitable and it has noise rating of 70db, rather than 74 on the AMSs and 73 on the J OEM marked tyres.

Does anyone have any experience of the Mercedes ‘derivative’ on the F Type? And Is the claimed quietness of the tyre specific to the Mercedes vehicle it’s homologated for. I can’t help thinking I’m missing something,

I use the car as a tourer and so so it could be an option if the noise difference is that significant.

I have not ruled our PS4 or C7s yet either.

Thanks

Smc
P450 AWD Convertible, Santorini Black - Black Edition.

 

[Anonymous]

I previously posted this back in 2018 which might answer your question.....

I went to Pirelli performance centre to ask about homologated tyres last month.
Mine came from factory with AMS rears and JLS fronts (which is correct for mine - and the correct winter tyres are "J" all round).

The difference in homologation is the compound across the tyre and structure which are generally very slight and quite small and are different due to manufacturers requirements for handling, bias and mainly chamber/toe setup. They seemed quite knowledgeable on the subject and only identified BMW and Porsche as being visually and noticeably different due to chamber angle on BMW and rear weight in Porsche 911's.

I've had two new rears from Pirelli which are the new P-Zero ones of which there are 56 different OE homologations, including some of the worlds most prestigious cars, such as the Lamborghini Centenario, Pagani Huayra BC and McLaren 570S GT.

Car insurance wise, as long as size and speed rating are correct then you should be OK. No car policy I've seen states correct homologation. I stand to be corrected if anyone can find anything. Although why put on a Mercedes tyre on a Jaguar. Although would you notice under normal driving? Although if you car span out of control on a bend would your car insurance check homologation? I would guess not 99.9% would not. Possible grey area. There was a survey on car insurance and tyres and only a very small percent confirmed they knew what the markings on the tyre actually meant!


According to Pirelli
The reason homologation makes sense is this: “The advanced performance and technical characteristics of today’s premium and prestige cars can no longer be sustained by identical tyres for every model. The ingredients of Pirelli’s perfect fit strategy are dedicated technologies, processes and materials. By blending these elements together, in accordance with the needs that each manufacturer’s engineers identify right from the design phase, Pirelli is able to develop tyres that are tailor-made for each car.”

You could argue it would be like hiring a top racehorse out for children’s rides on Brighton beach. In other words, there are horses for courses and a high performance vehicle is going to respond better when shod with the proper boots. Horacio Pagani, founder of Pagani Automobili, expressed it more eloquently as: “People don’t realise the engineering that goes into a tyre. The tyres are the shoes of a car, determining how, when and where a car expresses itself".

 

[Jaguandy]

I've had Mercedes tyres on my previous XFR, because they were cheaper at the time. I didn't notice any difference.

 

[scz4]

Interesting topic, I'm in the same situation for my P450 rears.

The Michelin PS5S is only available in Mercedes fitment. Expensive though.

https://www.blackcircles.com/brands/michelin/pilot-sport-s-5/295-30-r20-y-101?tyre=46070096

Read really good things about the Conti 7, however the wear rate compared to Michelin perhaps makes them a false economy.

 

[scm]

I've got Mercedes Michelin PS4S all round on mine - runs fine.

 

[mono-uk]

I had Mercedes ones as thats all they had and i was desperate, noticed zero difference in driving

The big plus with the Mercedes one is the sidewall is designed to protect the rims from kerbing which was actually quite nice

 

[SMC]

Thank you all, I appreciate the feedback. .