Winter tyre options for an S8?

[Adrian E]

My lovely, shiny, recently re-furbished 20" FE alloys are proving to have pretty much useless grip on snow with Michelin PS2 rubber.

I've been religiously working through the handbook and the only advice I can find about winter tyres is that 225/55R17 is the only tyre size approved for use on the car. No info on compatible/recommended wheels or even the basic wheel dimensions and offset?

Has anybody done any research on what wheels from the Audi range will accommodate that tyre size and fit the S8 with no brake clearance issues? The front brakes don't exactly look tiny under the 20" rims, so I'm a bit concerned whether 17" wheels will actually clear everything?

I'm hoping there's a fairly common run of the mill wheel option from elsewhere in the Audi range that I can pick up for not much money which will save the FE rims from getting a pasting from road salt.

Cheers

Adrian