Tyre size for A6 3.0T

[hankhill]

I’m going to need new tyres soon, I’ve always liked and used Goodyear F1 on previous cars, but they don’t seem to come in my size. Car is a 2009 A6 Avant 3.0T, and current tyres are 225/50 R17. Looks like the nearest size of Goodyear Eagle F1 Asymmetric 2 is 225/45 R17. Should I make another choice or will they fit ok?
TIA

[ManOpener]

You'll need an XL load rating in Eagle F1 Asymmetric 2's on a car of that weight. If you wanted to stick with Goodyear they do the EfficientGrip Performance in the correct 225/50 R17 fitment and a 98 load rating which should be fine for an A6. I'd also look at the Michelin Primacy 3.

225/50 R17 looks like an expensive size. 98-rated EfficientGrip Performance in 225/45 are a good 30% cheaper!

[Kell]

There's no difference in width, so they'll fit, but they are slightly shorter so your speedo will overestimate the speed you're doing.

According to the Mazda Miata Tyre size calculator (excellent resource btw) your speedo would be out by 3.4%. Not sure if that's in tolerance or not.

[Kell]

Also, the wheels seem small for a 3.0T. I thought most of the Sportier A6s had 18s.

[ManOpener]

Do you know the width of your wheel? 225 is between 7-8.5" with the "sweet spot" 7.5-8". Changing tyre width might give you more options.

[hankhill]

The wheel size is 7.5J x 17 H2 ET45 so I guess that's 7.5" wide. Does that help open up my options?

[hankhill]

Kell said:

Also, the wheels seem small for a 3.0T. I thought most of the Sportier A6s had 18s.

This one is an SE, not S-Line. I didn't have much choice as I bought it used, but I'm glad really, as the roads in this country are full of pot holes and speed bumps, so I didn't really want thin tyres and stiff suspension. It was Hobson's choice however - these are rare cars, apparently 95% of Audi A6 estates are Diesel.

[ManOpener]

There seems to be a better and cheaper selection in 215/50 R17. That would fit 7.5" wheels fine.