Shimano R9250 Dura-Ace Di2 Groupset ABUSMARCH Technology: built-in KinetiCore enhances protection FX80304197 Size:167mm/172mm Independent laboratory testing consistently D3

Shimano R9250 Dura Ace Di2 Groupset ABUSMARCH Technology: built in KinetiCore enhances protection FX80304197 Size:167mm 172mm Independent laboratory testing consistently D3 Technology: built in KinetiCore enhances protection from rotational impact in the event of a crashFit system: Advanced TurnSys adjustable fit system with quick snap buckle for fast and stable fitEyewear friendly: allows secure storage of glasses without temple arm discomfortLED compatibility: compatible with Universal Lazer LED light for enhanced visibilityWinter ready: compatible with soft fleece Winter Kit for cold weather rides (kit not included)Size range: S (52–56 cm) M (55–59 cm) L (58–61 cm) XL (61–64 cm) and backcountry epics