Wolf Tooth Chainring bolts use a large hex socket on both the bolt (5 mm) and the nut (6 mm)

It attaches with no tools

4 x Replacement Barbs

Designed and built specifically for a wide variety of bicycle Torx compatible work

Suitable for front and rear derailleurs

E-Thirteen Helix R Crank Arms - 175mm - 30mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black Dangerous Goods Wolf Tooth Chainring bolts usee*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