Shimano Tiagra Groupset on Giant Defy 4 2011

wacka
wacka Posts: 169
edited October 2012 in Workshop
I am wondering if it is possible to change my current shimano 2300 8 spd groupset to a tiagra 10 spd? Would it be possible to change the currently fitted RPM cartridge square taper bottom bracket to the shimano tiagra 4600 BB? Any advise please.