Bottom Bracket & Chainrings

The BB standard is threaded BSA 73mm, which is compatible with many aftermarket bottom brackets.

Minimum chainring size is 28T and maximum is 34T. Single front chainring only.

Chain guide / bash guard is mounted using the ISCG-05 standard.

See the SRAM Chainlength calculator  https://axs.sram.com/guides/chain/calculator for recommended chain length for T-Type transmission setup.

Rear Derailleur Hanger

Both the SJ and SJ Evo use the SRAM Universal Derailleur Hanger (UDH) (S202600002). See the SRAM UDH Installation Manual for instructions.

Frames are compatible with either SRAM Transmission or standard drivetrains.

Grease should not be used on any part of the UDH.

Use caution when installing the UDH as the bolt is left hand threaded.  Avoid tightening the UDH bolt with a wheel installed as this will increase the torque on the axle as well as the UDH bolt.

Brakes

The rear brake uses post mount standard with a 180mm minimum rotor diameter.  Maximum rear rotor size is 220mm.