Micro Drive II chainrings are compatible with 1-piece and 22mm 3-piece BMX cranks. CNC machined 6061T6 alloy construction TECH SPECS Mount Compatibility 1pc/3pc Teeth 25T Type Material Alloy Spec Color Black Chain Compatiblity 1/2` x 1/8` Tooth Type Standa
Micro Drive II chainrings are compatible with 1-piece and 22mm 3-piece BMX cranks. CNC machined 6061T6 alloy construction
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