FSA slk Carbon - Compact???

drumsmasher Posts: 241
edited September 2008 in Workshop
i have an FSA SLK Carbon Chainset with 53/39 rings and want to know if i can swap them for compact size 50/34 or will i have to buy a whole new chainset. If anyone knows i'd be grateful for the advice. Cheers.
Another tree...another cracked rib!!