hi all i am looking for some advice do any of you know if a genuine set of audi 18" s line alloy wheels with 235/40/18 tyres will fit on a 2007 octavia vrs or will i need spacers any help would be very much appreciated thanks in advance

You need to know the width and offset of the new wheels and compare that with the oe spec (7.5x18 ET51) using an offset calculator - there are several on the web.

Some audi wheels fit, some don't - it depends what model they are from.

235/40 are wider and a larger diameter than the 225/40 fitted as standard.