SRAM X-Sync 11-Speed 48T 110mm Chainring Black Model=Dura-Ace RD-R9250 Di2 12-Speed Rear Derailleur Color Silver/Gray Half Link Chain

Color Silver/Gray Half Link Chain No Drivetrain Speeds 12 Defined Color Silver Links (links) 126 Weight 260 Chain Connection Type Single Use Master Link

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}NiteRider Lumina Micro 900/Vmax+ Headlight and Taillight Set

The perfect choice for virtually any track

SRAM X-Sync 11-Speed 48T 110mm Chainring Black Model=Dura-Ace RD-R9250 Di2 12-Speed Rear Derailleur Color Silver/Gray Half Link ChainSRAM X Sync 11 Speed 48T 110mm Chainring Black. SRAM X Sync chainrings feature tall teeth with alternating tooth profiles that hold the chain amazingly well and still provide space for mud to clear. Full CNC AL rings TECH SPECS Tooth Count 48 Ring Position Type Chain Retaining Single Ring Drivetrain Speeds 10 Drivetrain Speeds 11 Chainring BCD 110 Color Black Defined Color Black Material Aluminum