SRAM 42 Tooth 107mm BCD x 4-Bolt 1x12-Speed X-Sync Chainring Blast Black Links (links)-114 }Shimano Dura-Ace ST-R9250-R Di2 Dual

}Shimano Dura-Ace ST-R9250-R Di2 Dual Control Shift/Brake Lever for Rim Brakes - Right 12-Speed Black

Brake Track Non-Machined Color Black Defined Color Black Hub Drilling 32 ISO Diameter 622 / Road / 29" Manufacturer Spec ERD (mm) 597 Rim Center Offset (mm) 0 Rim Material Alloy Rim Width (Internal) 18

Length 350 Color Black Diameter 31

Maximum tire size is 28C

Sealed bearings and IGUS bushings

SRAM 42 Tooth 107mm BCD x 4-Bolt 1x12-Speed X-Sync Chainring Blast Black Links (links)-114 }Shimano Dura-Ace ST-R9250-R Di2 DualSRAM 42 Tooth 107mm BCD x 4 Bolt 1x12 Speed X Sync Chainring Blast Black. SRAMs X Sync Road Chainrings are designed for provide maximum control when used with AXS road cranksets. X SYNC wide tooth narrow tooth chainring technology provides maximum chain control Laser etched chainring finish is more durable X Range gearing technology gives you more range and a smoother gear progression so youre always in the right gear Can be installed with a single