E-Thirteen Helix R Crank Arms - 165mm - 30mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black Exclusive Cinch-loop requires less cable for

Cinch-loop requires less cable for effective lock-ups

Trail and XC riders chasing a minimal clip in pedal

5" 37/44/46mm

It also absorbs impact forces in the event of a crash

Clutch style: This features Shimano Shadow Plus Clutch

E-Thirteen Helix R Crank Arms - 165mm - 30mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black Exclusive Cinch-loop requires less cable fore*thirteen has lots of love for aluminium. Knowing weight, strength and looks were top priorities for riders, they went after all three with a vengeance. The Helix R is their top of the line aluminium alloy crank. Forged AL 6066 T6 arms deliver Enduro strength in XC weights and it took a 30mm Forged AL 7050 T7 spindle and massive amounts of CNC work to get there. CNC detail can be seen all over every surface for the ultimate in tech bling and weight