E-Thirteen Helix R Crank Arms - 175mm - 30mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black Ignore Wholesale Tier 2 Brand Rule With ProTaper's PFL (plastic Foam

With ProTaper's PFL (plastic Foam Lamination) manufacturing utilising tiny particles and steam pressure in the lamination process to expand and shape the structure of the bars resulting in a 15% lighter bar

they have proven to be extremely durable

Ventilation: Medium sized angular vents increase air intake and heat exhaust

a universally compatible head

E-Thirteen Helix R Crank Arms - 175mm - 30mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black Ignore Wholesale Tier 2 Brand Rule With ProTaper's PFL (plastic Foame*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