The CeramicSpeed Shimano Mountain Bike Bottom Bracket houses superb quality and handbuilt mechanics Featuring CeramicSpeed Standard Bearings that are installed into cups the bearings have super smooth super round CeramicSpeed balls contained in hardenedsteel races The PF30 standard has opened design possibilities for mountain bikes The CeramicSpeed PF30 Shimano Mountain Bike Bottom Bracket gives you the ability to install Shimano and other 24mm diameter spindle cranks on your PF30 Mountain Bike The PF30 Shimano bracket can last three times longer than other bearings thanks to the hardenedsteel races and ceramic balls that are 100 smoother and 15 harder than the ceramic competition These feature a frictional drag of 0304 watts per set which represents an average 75 drag reduction compared to most bottom brackets The CeramicSpeed PF30 Shimano Mountain Bike Bottom Bracket is unparalleled in durability and efficiency

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