The Ekar GT crankset without a front derailleur, with its significantly reduced weight and great chain security, is the heart of the 1x Ekar GT system.Two-piece crank arm: half-bolts Ultra-Torque made from AISI 630 steel and aluminum arms, robust and lightweight.Half-bolts with Hirth ProTech joints: strong, efficient, and self-aligning.7075 aluminium crankset easily interchangeable by unscrewing the 4 screws without having to remove the crank arms.BCD: 104 mm.Q factor: 151 mm.