Enduro - bearing 6702 2RS 15x21x4 abec 3

Blackspire MTB SUPER PRO chainrings are designed for 9, 10 and 11 speed MTB drive systems. This chainring is CNC machined from 7075 T-6 aluminum. Stainless steel pins are placed on the outer and middle tooth blades to improve shifting performance. These chainrings are available in different teeth and BCD sizes for both 4- and 5-arm cranksets.

A standard Schwalbe tube holds the air considerably longer. Due to the purity of the rubber compound. Due to the uniform wall thickness.