BOX TWO BMX 104mm 39T 4B BLACK AIR TAG HOLDERS

BOX TWO BMX 104mm 39T 4B BLACK AIR TAG HOLDERSMade in the USA from 6061 T6 aluminum alloy, Box Two BMX Chainrings are round and true They fit 104 BCD four bolt cranks and are available in black anodized with laser etched graphics from 38 to 45 teeth

Additional features include disc brake compatibility and a protected rear light mount

Cable groove compatible with new Di2 systems w/ larger internal cable tunnel

Discreetly and easily mounts at the rear of the underside of the seat

Bar can be installed in a rise or drop position

One lock-on collar

For use with RockShox 15x110 Boost forks ONLY

Ergonomic relief center section

Reinforced side pockets made from a durable EVA shell

and 12-speed) as well as some single-speed models and e-bikes

The BBT-49

11 function

Intended for use with the Box Four drivetrain only - may not function ideally with other 8 speed drivetrains