This rebuild kit provides the specific 3 0mm Drive & 28mm NonDrive bearings to rebuild your stock Praxis M30 bottom brackets. The Rebuild kit is for : M30 BSA, BB30/PF30, 386EVO, BBright, T47 E.B and T47 I.B. VIP NOTE : Do NOT order this for the M30 BB86/90/92 BB. That BB cannot be rebuilt. Read important spec info below… This rebuild kit provides the two specific bearings Praxis M30 bottom brackets. Original Bearing rebuild kit for Praxis M30 BB | 30mm DRIVE / 28mm NonDrive Used with : M30 BSA, BB30/PF30, 386EVO, BBright, T47 E.B and T47 I.B. VIP: Do not order this rebuild kit if you have a M30 BB86/90/92. That M30 BB cannot be rebuilt. Must use professional level bearing tool kit to rebuild your M30 BB. IMPORTANT : You are required to use proper bearing installation/removal tools to pull/press new bearings into a Praxis M30 bottom bracket. Failing to use correct tools can and will damage your new bearings and/or your BB and void your warranty. We highly suggest using Enduro’s bearing removal/press tool kit or similar shop level bearing tool kit. If you do not have the correct tools, please take your bike to a local bike shop for bearing replacement.