Instruct: Classify Amazon reviews into positive or negative sentiment
Query: pyramid mx3 BB set

this bottom bracket set is cheaply made ' bearings grind in bearing cup's which rip away at the chrome plating which in turn wear out the bearings' sounds like gravel in b-b , I replaced the cup's & bearings within a week , but you get what you pay for , could use some spacers also but for the price its worth the it for the use of the spindle & other parts .