Going from a 1x8 to 2x10 setup
To go from a 1x8 to 2x10 drive train you will need:


Replacement shifters for 2x10 drive trains
Front derailleur for double 10 speed crankset
Double 10 speed crankset
10 speed chain
10 speed cassette
10 speed rear derailleur
Cable outers for front derailleur