• Aluminum spacers made by Luna for fitting of the BBSHD
• Helps with odd sized Bottom Brackets and other fitting issues
• You can choose 1mm thick, 2mm, or 4mm spacers
• Goes around the shaft of the BBSHD
• If the triangle plate lines up with the two bolt attachments but is not flush against the BB of the frame then THESE are the spacers you are looking for
• For more info on mounting the BBSHD on fatbikes with intrusive chainstays check out (this article).

According to Karl from electric-bikeblog.com the golden rule of BBSHD installation is "Your mounting plate must be totally flat against the BB Side

These spacers make that a cinch to happen.