FrameCO2 Alloy 1 1/8" ForkRST Gila Pro, 100 mm w/Lock out Rear ShockN/A RimsJalco Disc X320, 32 hole HubsFormula DC20/22 SpokesStainless Steel TiresKenda Nevegal, 26 x 2.1"  PedalsWellgo alloy platform CrankFSA CK-306TTT, 22/32/44  ChainKMC 8-speed Rear CogsSunrace M66, 12-32  Bottom BracketFSA TH-7420ST  Front DerailleurSRAM 3.0 Rear DerailleurSRAM X-4 ShiftersSRAM X-4 Trigger HandlebarsHL,650 mm, 25 mm rise StemCannondale XC3 1 1/8", 31.8 mm HeadsetSlim Stack A-Head BrakesetAvid BB-5 Mechanical Disc BrakeleversCannondale XC SaddleCannondale CO2 Seat PostKalloy SP-359  ---- where and what to change for a better? thanks..