Perfect to 107BCD chainrings, FORCE 107bcd chainring , RIVAL 107bcd chainring, and STONE 107bcd chainrings.
Material aluminum 7075, full CNC process.
Weight 55g.
High precision process, the precision upto 0.03mm. No side play after install.
Offset 0mm which is same to original parameter.
Those spider can install double chainring, and also single chainring.




