Speed rating

[polar]

My Audi 3.0 sport cabriolet has the following tyres

235/45/R17 Z rated.

Are these the correct tyres as there are lots of different speed ratings.

What does everyone else use

 

[polar]

I have just looked at the pro tyre site and entered my registration.

My tyre size comes up at 225/45 R17 W

My current Tyres are 235/45/r17 Z

What are the correct tyres for an Audi 3.0 Coupe sport

 

[Woorlord]

I have 235/45 ZR 17 94Y on my 3.0QS

Useful Speed Rating Link Here