they have proven to be extremely durable

it won't harm rubber o-rings or metal surfaces either

Includes pawls

Features TruTaste polypropylene and HydroGuardTM

190x40mm Metric - BAD2064

Box One Prime 9 Speed X-Wide Groupset - Multi Shift - 11-50T - 9 Speed netsuite-webdata-created they have proven to beBox hit the market for a six when they unveiled the wide range Prime 9 families of components. 454% range in a compact 9 speed package was unheard of until now! Box One is the top of the range drivetrain with all the bells and whistles. A full unibody steel cassette weighing only 365g, adjustable clutched derailleur and a dual DLC nickel plated chain make this the flagship 9 speed option from Box. Compatibility: The Prime 9 component range is not