Air Force
Zero Resistance Shifting System
Unique tooth design-ZRSS reduces resistance while shifting
Unique tooth design-ZRSS reduces resistance while shifting
．Length - 165mm, 170mm, 172.5mm, 175mm
．BCD - 110mm
．Chainring - 50/34T
．Chainline - 43.5mm
．BB Cups - BB-1.37x24/68mm
．BB Axle - Cromoly SCM435
．Weight - 960grams (complete set)
*The fifth arm hidden behind the crank