SHIMANO DURA-ACE BB-7700 OCTALINK BOTTOM BRACKET Size:68x109.5mm BSA the HRM PRO TM Plus

the HRM PRO TM Plus stores your heart rate during an activity

HG-X Chain uses a directional design with specifically shaped inner and outer plates to optimise shifting over the chainset and cassette

Number of holes: 24

Dimensions: 32 × 102 × 33 mm

SHIMANO DURA-ACE BB-7700 OCTALINK BOTTOM BRACKET Size:68x109.5mm BSA the HRM PRO TM PlusThe Shimano BB 7700 Dura Ace bottom bracket delivers precision engineering for demanding cyclists. Featuring Octalink axle profile, this unit ensures secure crank attachment and reliable power transfer. Available in both BSA and Italian thread options to suit your frame's bottom bracket shell. Built with Shimano's legendary durability, the BB 7700 combines smooth bearing performance with robust construction. An essential upgrade for riders seeking