E-Thirteen Helix Crank Arms - 170mm - 24mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black PDP|Colour The Giro Arc is a

The Giro Arc is a lightweight

The visor adjusts for easy goggle storage between laps

It uses 6000 series aluminium stanchions and the familiar magnesium alloy lowers

The perfect CO2 tire repair solution for racing

They recommend the 36T for most people

E-Thirteen Helix Crank Arms - 170mm - 24mm - 68-73mm - E-Thirteen Direct Mount - No Spider - No Chainring - Black PDP|Colour The Giro Arc is aThe Helix crank arms from E*Thirteen combine forged AL 6066 T6 aluminium alloy arms with a heat treated 24mm Cro Mo spindle to deliver a super cost effective, performance crank that is light and strong and suitable for most MTB pursuits. Features: Lighter weight for improved acceleration and climbing Strong enough to shuttle run bike parks Durable aluminium alloys for years of trust and confidence Can be combined with either Shimano or SRAM 11 and 12