I upgraded this bike from a 21 to 27 speed MTB
Frameset: 16” CAAD 2 aluminum frame/ Spinner Chromoly fork
Headset: Aheadset SE-1
Stem: Coda
Handle Bars: Coda straight bar
Brake Levers: Tektro 379A
Crankset: *Shimano Acera Hyperdrive M361
Chainrings: *22/32/42t
Bottom Bracket: *BB-LP26
Brakeset: Lee Chi ProMax TX22
Rear Derailleur: Shimano Deore LX RD-M570
Front Derailleur: Shimano Alivio
Shifters: *SRAM Rocket 9 speed grip shifters
Cassette: *SRAM PG-950 9 speed, PowerGlide II, 11-34t...