Tiagra 4600 weight comparison with Tiagra 4500 9spd difference in bracketsrear derailleur RD-4600-SS: 256 (-1)rear derailleur RD-4600-GS: 266 (-8)front derailleur double FD-4600-B: 105 (-10)front derailleur double FD-4600-F: 89 (-12)front derailleur triple FD-4603-B: 132 (-8)front derailleur triple FD-4603-F: 114 (-13)crankset FC-4600 double: 943 (-47)crankset FC-4650 compact: 903 (-66)crankset FC-4603 triple: 1105 (-24)Rapidfire Plus shifter SL-4600-R right: 137 (0)Rapidfire Plus shifter SL-4600-L left: 137 (0)Dual Control Lever ST-4600-L left: 251 (+7)Dual Control Lever ST-4600-R right: 258 (+6)Dual Control Lever Triple ST-4603-L left: 250 (+7)cassette sprockets CS-4600 11-25T: 261 (0)cassette sprockets CS-4600 12-28T: 310 (0)cassette sprockets CS-4600 12-30T: 329chain CN-4601 114 links: 277brake lever BL-4600 front and rear: 375 (0)brakee caliper BR-4600 set: 375 (0)freehub FH-4600: 357 (0)front hub HB-4600: 155 (0)怎麼夢裡面都英文的cassette sprockets CS-4600 12-30T 流口水中