How do I tell, without taking the wheel off how big my rear brake discs are. 57 plate VRS

Stick your reg into Euro car parts site.

but double check the parts before you order.

Edited 24 April, 201313 yr by Aspman

Did that and it gives me about three different size options.

286mm diameter 10mm thick solid, mine are 255mm and 10mm solid as I have a Sport and less bhp as standard than the Vrs. Someone will be along soon and verify no doubt!

My vrs is a 08 plate it's 312mm front and 288 on the back. For from MTEC brakes

Ok. Got some 286mm ones and hope they are ok. If they are bigger can they still be put on as an upgrade ? Thanks everyone for their advice so far.

They were 286mm. Got rear pads and discs changed for £120 by buying the parts from a motor factors and having a garage change them for £40 which I thought was ok.