xr2rob

hey guys im trying to get some cossie discs and callipers to go on my xr2. i know i need the wheels first but thats next. on ebay is a advert for escort rs turbo cosworth brakes and callipers. he claims they are 290 mm discs. my friend has fitted cossie discs and pads from the escort (4x4 basically sapphire ones would work too so long as its a 4x4 model) cosworth and he has measured them to be 278mm which is what they should be right?

the callipers are just single pot floating like a standard cossie but the disc size isnt ringing my bells. any ideas.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=015