e*thirteen Helix Race GR Crankset – 160 mm, 83 mm spindle – Forged AL 6066‑T6 arms, 30 mm AL 7075‑T7 spindle, 56.5 mm chainline with Helix GR Chainrings, gravity-rated (ASTM 5), molded crank boots, APS preload, P3 Connect. Black Weight 590 g.