e*thirteen Helix Race Cassette - 12-Speed 9-45t Gray Max Height-320 The resulting adhesive grip surface

The resulting adhesive grip surface massively increases control and reduces fatigue

Tooth Count 20 Cassette Body Type Shimano 7 Speed Material Steel Drivetrain Speeds Single Speed 3/32"

}Ritchey Di2 Seatpost Internal Battery Mount - 27

Slots and hook-and-loop simplify bag installation

e*thirteen Helix Race Cassette - 12-Speed 9-45t Gray Max Height-320 The resulting adhesive grip surfacee*thirteen Helix R Cassette 12 Speed 9 45t Gray. The e*thirteen Helix R 12 speed cassette is an upgrade to any SRAM Eagle or Shimano drivetrain and offers more range than other cassette options. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance but an overall lighter drivetrain. Works flawlessly with Shimano and SRAM drivetrains including electronic shift systems