The Hope PF46 Bottom Bracket is incredibly reliable, smooth and available with two different bearing options. This Hope BB is crafted from incredibly durable materials for an uncompromised long-term performance and comes with the option of stainless steel or ceramic bearings. The bearings are made by INA and have been designed to run directly on the chainset axle, without the use of shims or spacers - again increasing life and reliability, the machined aluminium centre tube is sealed internally with o-rings. A free running labyrinth seal to protect the bearing externally. These custom, Swiss made bearings are double sealed which gives much greater life span than stock units. They are also replaceable. Ride with confidence with the Hope PF46 Bottom Bracket! Hope PF46 Bottom Bracket Features Fits BB92, BB89.5 and BB86.5 frames Cups pressed in and held in place by a screw in centre tube stopping any movement or play usually found in press-fit frames Stainless steel or ceramic bearings Easily serviced, replaceable sealed bearings and external labyrinth seal Compatible with any 24mm axle cranks Specific fitting tool (made by Hope) required for fitment "