On bicycle jumbles you might have came along a lot of chainrings sold from greater boxes and garage sales where nobody knows where these chainrings come from or to which crank set these might fit.
Following I will give you some hints about how to recognize what chainrings will fit your cranks. The only thing you need is one ruler or a tape measure and to know what BCD your cranks fit to.
How do I measure my chainring?
- Measure the distance in millimeters between two adjacent chainring mounting holes (center to center).
- Use this distance (x) to find your BCD in the chart below:
Hope that helps recognizing the appropriate chainring when visiting a cycle jumble next time.
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