Pirez - Bottom Bracket Fit Kits

Pirez offer a range of items to assist with the correct alignment and fitting of Bafang mid-drive motors.

Our Premium - Black Fit Kit provides the following items to assist in that correct alignment.  

• Bottom Bracket Spacers (mixed sizes) - Qty 4
• Washers (1.2mm) - Qty 10
• Mounting Screws (16mm) - Qty 2

This Fit Kit should provide a sufficient amount for most bikes.

Note: We also have a Standard - Silver Fit Kit which is a little more economical as it is silver in colour and provides limited spacing options, but is still suitable for most bikes.

Note: It is not necessary to use all these items. You simply use the items you need.

 

| INCLUDES

 

• Bottom Bracket Spacers (multiple sizes) - Qty 4

These bottom bracket spacers are designed to allow a sufficient gap between the main gear housing of the motor and the bike frame.

These four spacers are 1.0mm, 1.5mm, 2.0mm and 2.5mm wide.

Depending on the combination of spacers used, you can achieve a spacing of:

• 1.0mm = single spacer
• 1.5mm = single spacer
• 2.0mm = single spacer
• 2.5mm = single spacer
• 3.0mm = 1mm + 2mm
• 3.5mm = 1.5mm + 2mm
• 4.0mm = 1.5mm + 2.5mm
• 4.5mm = 2mm + 2.5mm
• 5.0mm = 1mm + 1.5mm + 2.5mm
• 5.5mm = 1mm + 2mm + 2.5mm
• 6.0mm = 1.5mm + 2mm + 2.5mm

We only recommend using a maximum of 3 spacers.

The spacers are placed over the mid-drive axle of the motor, so they will sit between the main gear housing and the bottom bracket.

Once this gap is the correct distance, you need to ensure the triangular mounting plate will sit straight, perpendicular to the axle.

You can use the washers to achieve this.

• Washers (1.2mm) - Qty 10

Install the necessary number of washers on the mounting screws, adjacent to the triangular mounting bolt to ensure it sits straight. You generally should not need more than 5 washers on each screw.

• Mounting Screws (16mm) - Qty 2

If you have added a large number of these spacers and washers to fit your motor, the original screws provided with your motor may not be long enough.

This kit provides a pair of longer substitute screws.