Bolt Circle Diameter Tool – 3D printable model from Thingiverse

Thingiverse

Bolt Circle Diameter Tool

by aiber

119 Downloads

94 Likes

2 Makes

bcd bike bolt chainring circle diameter measure tool bcd bike bolt chainring circle diameter measure tool

Used to read off the bolt circle diameter or BCD of 4 & 5 arm cranksets so you can swap out chainrings.

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Thingiverse

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