These direct mount chainrings fit the HEIR cranksets. Lightweight machined aluminum construction.
Determining Chain Ring Offset
- If your bike has 148mm rear spacing (Boost), choose 3mm chain ring offset
- If your bike has 135mm or 142mm rear spacing, choose 6mm chain ring offset (most kids bikes fall under this category).
Compatibility
These chainrings are compatible with:
Not compatible with Alpha Series bikes.