Groupset Shimano Sora 9 Spd Triple Groupset Bottom Bracket Shimano 4500 BB Cups (34/4500 double/triple) Eng Brakes Shimano Sora 9 3400 Brakes Cassette Shimano 9 Spd HG50 (Sora/Tiagra) Cassette 12-25 Chain Shimano 9 Spd HG53 Chain (Sora/Tiagra 9/Deore) Chainset Shimano Sora Triple 3403 9 Spd Chainset 170 30/39/50 Front Gear Shimano Sora 3403 9 Triple Front Gear Braze-on Rear Gear Shimano Sora 9 Spd Rear Gear Medium Gearshifter Sti/Ergo Shimano STI Levers Sora 3400 9 Spd with Cables Double/Triple