1. a 2. http www shimano com ewp SI 1KYOA 002 FC 7900 FC 7950 FC 7900 FC 7950 A 53 42T B 53 39T 52 39T 54 42T 50 34T 55 42T 56 44T 130 mm 110 mm 165 167 5 170 172 5 175 177 5 180 mm BC 9716X20 CN 7900 3. 1 2 WI BB FC FC PD 4. 43 5 mm ee 68 mm 1 37 X 24 TP I 70 mm M36 X 24 TP I DA 12 N m 120 kgf cm TL FC32 1 2 TL FC32 36 35 50 N m 5. 350 500 kgf cm 3 4 A 70mm M36 5 TL FC16 0 7 1 5 N m 7 15 kgf cm 6 2 12 14 N m 120 140 kgf cmi Ll a OQ EK QD dg IPS 0 KN Val 2 0570 031961 Fax 072 243 7847 3 77 590 8577 6. SI 1KYOA 002 00 2 12 14N m 100km