A. Enclosed In Box

  • BB Cup
  • Special Bearing
  • Dust Covers
  • Spindle Spacer
  • Nano Lubricant
  • Assembly Lubricant

*Some products have different contents

B. Tools for Installation to need

  • BB Tool
  • Hex Wrench

C. Steps

Clean the bottom bracket thoroughly to ensure that there are no old oil stains and dust.


Coat the inner edge of the frame shell with the assembly oil and spread it out evenly.


Coat the assembly oil on the out edge of BB cup.


First step,Execution by type.

    Press Bottom Bracket

    The spindle with nut, thrust beaing , press tool and BB cup without bearing insert into the frame shell then the other side put into the BB cup without bearing, press tool, thrust bearing and nut. second step, use hex wrench press two side .

    note: it need to press one side a little then the other side press a little. slowly press into the frame shell. it not allow to press BB cup of two side one time. (If you use non-mortop special tools. the BB cup have to include the bearing).

     *Part of the press bottom bracket does not apply

    Twist Bottom Bracket

    First press one side the BB cup without bearing into the frame shell then press the other side BB cup without bearing into the frame shell, the second step, twist the BB cup, last step use the Mortop ISIS 20T installation tool to lock tight two side together.

    note: it need to press one side a little then the other side press a little. slowly press into the frame shell. it not allow to press BB cup of two side one time. (If you use non-mortop special tools. the BB cup have to include the bearing).

     

    External Bottom Bracket

    Coat the assembly oil on the thread of BB Cup ot two end and twist into the frame shell (please check what cup spacer size it need to put in) .

    External Bottom Bracket cup spacer reference

    Road
    MTB
    MTB

    Frame Shell Width 68mm

    Frame Shell Width 68mm Frame Shell Width 73mm

    L : 1mm Cup Spacer*1

    R : 1mm Cup Spacer*1

    L : 2.5mm Cup Spacer*1

    R : 2.5mm Cup Spacer*2

    L : 2.5mm Cup Spacer*1

    R : 2.5mm Cup Spacer*1

     *The table is for reference and should be adjusted with actual tolerances.

     

    Check the distortion of the stroke or incomplete installation. If the installation is not correct, it will cause damage to the bearing and even affect the frame when riding.

    Apply assembly oil on the outside (orange sealing ring) of the bearing and inside of BB cup of two side.

    Put in option spindle spacer, dust cover, bearing in order on the spindle of crank. (please pay attention to the directionality of the bearing, the orange sealing ring faces freewheels). 

     Put in the crankwheels with bearing into frame shell.

    Same steps as above to be done on the other side Install the bearing, dust cover,opition Spindle spacer, and leg set in order. (the orange sealing ring of the bearing toward leg set)

    After cleaning up the remaining oil around, wipe it down thoroughly. By following these steps, you can significantly extend the life of your bike and your riding journey.

    After assembly, ensure that the crank screws on both sides are installed correctly. Once the installation is properly done according to the given steps and instructions, match it up with Mortop's bearing and bottom bracket, and use our recommended lubrication. We guarantee you will definitely feel a huge improvement in speed and smoothness of ride. This is where it gets simple: enjoy your ride.