Top Marks for RPM Technik

[SonnyM]

Following recommendation on here I took my RS60 to RPM Technik this morning to get my symptoms of an unstable ride checked out.

Turns out there were no issues whatsoever with the car, and I believe that the uncomfortable ride is due to the change from N rated PS2s to Super Sports. I am surprised at how a change in load index can have such an adverse affect on the ride - so much so that I may change back to N rated PS2s sooner rather than later. This is a huge disappointment.

Tyres aside I just want to say thank you to the team at RPM who are very friendly and knowledgeable and who did not charge me a penny for spending 30 mins on my car (their Saturday surgery is free FYI). They have some lovely Pork there too.

Now I can look forward to my PH tour

[Fpaskell]

Intersting comment about the effect on ride of the load index; can you explain the different ratings between the two tyres? Presumably the MPSS is not avaiable with the correct load rating?

[SonnyM]

PS2 N2s are 94Y and PSS are 98Y. Yes you cannot get PSS in 94Y for the 987 Boxster.

I am assuming the tyre walls are firmer or there is another reason why the ride is harder. Either way the car now crashes over bumps and wobbles like you are on a boat when over even small bumps.

I'll switch back to N rated next time.

[Trev450]

I'm considering MPSS for my 987 Cayman S next (currently have MPS N2's) so would be interested to hear if others have found this to be the case.

[johnycarrera]

Have you tried lowering the pressures?

[SonnyM]

johnycarrera said:

Have you tried lowering the pressures?

Yes though I don't really want to go more than a few PSI below the recommended. The tyre walls are visibly stronger on the PSS.

[johnycarrera]

SonnyM said:

johnycarrera said:

Have you tried lowering the pressures?

Yes though I don't really want to go more than a few PSI below the recommended. The tyre walls are visibly stronger on the PSS.

Worth a try though, I run non N rated Pilot Sport Cups 10 psi below Porsche recommendations for regular road tyres and don't notice a drop off in performance and there's a huge increase in comfort

[SFO]

SonnyM said:

PS2 N2s are 94Y and PSS are 98Y.

I'll switch back to N rated next time.

the load index for the front tyres are higher on PSS too .. not sure what though