Havejust purchased some Focus RS Brembo setup with ST170 adaptor plates. The pads are brand new so I'm thinking of bedding them in by doing a track day on them, but my track car (Focus) runs 17s. Before I go to the hassle of trying to fit them has anybody else already tried.

Is it a case of

Yes they fit

They fit, but depends what wheels (would be ST170 wheels or OZ F1s)

No chance, you need 18s.

Ta in advance, any help appreciated.