2022 tyre option for Cerbera 16inch wheels

[LLantrisant]

I need to replace the tyres on my car as they extremely old....the bridgestone potenza speed-rating fom that period (ZR) is meanwhile aged /obsolete

front 225/45 R16, rear 245/45 R16

all tyres i can find have speed-index "W" (up to 270km/h / 168mph)...the Cerb has a max-speed of 184mph/ 296km/h, so needs speed-index Y...but i cannot find tyres in above size with speed-index Y.

i dont want to open a discussion "why you need Y?"...i need it for a certain reason.

[Jhonno]

Good luck.. Might be worth looking for similar sizes and a square setup.

[Oldwolf]

I struggled with tyres for the Chim and ended up with Pirrelli P Zero Rosso 245/45/16 94y

[DCerebrate]

Quick survey of mytyres site reveals no 225/45 16s with the required speeds rating. For 245/45’s there is Pirelli at ‘only’ £298 and a Michelin at £302. Time to switch to 17in wheels or 18in Spiders?

[Jhonno]

https://www.protyre.co.uk/tyres/car-tyres/pirelli/...

Cheaper to buy 17's and put tyres on them!

[LLantrisant]

i can only find Pirelli for the front (over 400,-€ per tyre) and Pirelli or Michelin for the rears, 270 or 370,-€ per piece

as the car needs to remain original...incl. its original wheels i have to find a different solution....

[jstx]

LLantrisant said:

I need to replace the tyres on my car as they extremely old....the bridgestone potenza speed-rating fom that period (ZR) is meanwhile aged /obsolete

front 225/45 R16, rear 245/45 R16

all tyres i can find have speed-index "W" (up to 270km/h / 168mph)...the Cerb has a max-speed of 184mph/ 296km/h, so needs speed-index Y...but i cannot find tyres in above size with speed-index Y.

i dont want to open a discussion "why you need Y?"...i need it for a certain reason.

For the street, there's the YOKOHAMA ADVAN A052 and not much else. TOYO PROXES R888R are for the track and both are W speed rated to 168mph.

[RUSSELLM]

LLantrisant said:

I need to replace the tyres on my car as they extremely old....the bridgestone potenza speed-rating fom that period (ZR) is meanwhile aged /obsolete

front 225/45 R16, rear 245/45 R16

all tyres i can find have speed-index "W" (up to 270km/h / 168mph)...the Cerb has a max-speed of 184mph/ 296km/h, so needs speed-index Y...but i cannot find tyres in above size with speed-index Y.

i dont want to open a discussion "why you need Y?"...i need it for a certain reason.

Are those tyre sizes from your owners manual ?

I think my manual states 235/50 R16 for the rears. From my experience, that won't make your search much/any easier.

[DuncanM]

I had to move to 17 inch wheels due to this problem.

You could buy W rated tyres though, and just don't exceed 168mph?

Nankang AS2 for ~100

[LLantrisant]

DuncanM said:

I had to move to 17 inch wheels due to this problem.

You could buy W rated tyres though, and just don't exceed 168mph?

Nankang AS2 for ~100

the problem is that the car is in process for homologation outside UK...and the local paperwork of the car will also state the max-speed...which is around 300km/h..so, unless the approval-engineer cannot be convinced to "reduce" the max-speed on his report to, lets say 250km/h, i will have a tyre problem.

by the way: the local paperwork also states the exact measurements of the wheels (D, W and offset), the wheel manufacturer or modell, the suspension fitted (e.g. GAZ, Spax, Bilstein) and even the height of the coil platforms and coil-rate (if there is a number on the coils) and the coil-colour.
furthermore the paperwork will also state the noise (static and driving) and i need an exemption for a smaller number plate, as the car was originally built for japan and thereofre the recess in the rear-bodywork is squaric for the typical small japanese reg.plate.





.

[DuncanM]

Ahh sorry, sounds like you have your hands full there.

Good luck, I hope you find a good solution.

[DCerebrate]

If regulators involved, they won’t give an inch unless there is literally no alternative. As the Pirellis are available you will just have to go for them. I recall buying a Ferrari Mondial about 2007. Tyres had great tread - but on the way home, no grip! Age was the problem, and the only solution was to buy a set of Michelin TRX metric size tyres @ just over £1000. That would be considerably more in today’s prices. I hope the rest of the homologation goes well.

[DuncanM]

It's annoying because the old ZR rating was quite vague really, and I doubt that they performed better than a current W rated tyre.

17" or 18" is the way forward.

[jstx]

LLantrisant said:

I need to replace the tyres on my car as they extremely old....the bridgestone potenza speed-rating fom that period (ZR) is meanwhile aged /obsolete

front 225/45 R16, rear 245/45 R16

all tyres i can find have speed-index "W" (up to 270km/h / 168mph)...the Cerb has a max-speed of 184mph/ 296km/h, so needs speed-index Y...but i cannot find tyres in above size with speed-index Y.

i dont want to open a discussion "why you need Y?"...i need it for a certain reason.

For the street, there's the YOKOHAMA ADVAN A052 and not much else. TOYO PROXES R888R are for the track and both are W speed rated to 168mph.

[Tye Green]

jstx said:

For the street, there's the YOKOHAMA ADVAN A052 and not much else. TOYO PROXES R888R are for the track and both are W speed rated to 168mph.

R888R perfectly Ok for road use too - particularly on a vehicle most likely to be used in dry conditions.

[LLantrisant]

at the end of the day i will only use this car for the typical local sunday blast.....so even a H-Index tyre would be more than sufficiant