CeramicSpeed BB ALPHA Bottom Bracket - PF30 73mm For 24mm/Shimano Spindle MTB BLK Model=GRX ST-RX815 Di2 Security Rating: 8 of 15

Security Rating: 8 of 15

Do-it-all tread handles many terrain types and provides predictable cornering ideal for enduro and all-mountain riding

Enduro or ALL mountain rides

} REAR SHOCK AIR CAN ASSEMBLY - DEBONAIR (INCLUDES DECALS

Whether you're navigating rugged trails or cruising through challenging terrains

CeramicSpeed BB ALPHA Bottom Bracket - PF30 73mm For 24mm/Shimano Spindle MTB BLK Model=GRX ST-RX815 Di2 Security Rating: 8 of 15A 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 7075 aluminum cups ensure quick installation and a 10% weight reduction over previous generations. All