Only for use the Praxis BB30/PF30/BBRight Collet/Conversion BB’s. BUY THIS IF : Replacing either of these parts on your Praxis “Expanding Collet” style BB. O-RING 1pc – This is the Non-Drive Width-Tolerance O-Ring.
It must be installed on the Non-Drive side cup. This O-ring for the Non-Drive cup is to compensate for frame shell width discrepancies RUBBER
COLLET 2pcs – The black plastic spacer and the orange rubber expanding elastomer.
These are the two pieces required on the Drive Cup of any of our Elastomer Collet BB’s.