The IRD Defiant Double Crankset was iInspired by the Zeus and Sugino Mighty fluted cranks of the 70's. The IRD Defiant is a stronger more reliable design since it is cold-forged before adding the fluting touches.
+ Retro styled
+ CNC-machined 7075 aluminum rings
+ Cold forged 6061 T6 aluminum arms
+ JIS square taper
+ 50-34t has a 110 BCD spider
+ 46-30t has a 94 BCD spider