Shimano BB-MT501 HOLLOWTECH II Bottom Bracket 68/73 mmShimano Bottom bracket Threaded HOLLOWTECH II 68 73 mm housing width Through better sealing and rotation, the SHIMANO DEORE bottom bracket headset can provide higher transmission efficiency. Sealed cups keep out dirt and water Maintenance free Compatible with 68 mm and 73 mm shell Durable anodised finish Easy installation BSA threaded

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Combination name (Group name) : 11-25T 11-28T 11-30T 12-25T 12-28T

Lever type                                                               : DUAL CONTROL LEVER

Type road bike

Solid shifting performance

Mount type                                             : Post-type

Links - 116 Links

Combination (11-32T): 11-12-13-14-16-18-20-22-25-28-32T

Crank arm length (mm) 170    : Yes

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Refined 12-step gear combination provides peak efficiency and accelerating performance for every situation

1pcs Shimano ST-R8000 2x11-speed