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Shifter Shimano 105 Di2 ST-R7170 Electronic Shift System
Dual compound rubber offers low rolling resistance and increased cornering traction
Designed to fit Syncros Creston iC Aero
In this way
CeramicSpeed Bottom Bracket - ALPHA BB30 MTB Crank Brand:SRAM DUB Shifter Shimano 105 Di2 ST-R7170A bottom bracket built to outlast your frame. BB ALPHA features hardened stainless steel races hand built with grade 3 Silicon Nitride ceramic balls, custom engineered seals and precision dust covers, delivering up to 500% better moisture protection, while still providing ultra low friction performance. The simplified spacer tube design and lighter cups ensure quick installation and a 10% weight reduction over previous generations. All CeramicSpeed BB