Of course, the single chainring is simple to use: no derailleur, significantly reduced weight, fewer moving components that collect dirt and can create snags, and high chain security, without unnecessary gear overlap – perfect solution for gravel trails.The two cranks made of UD carbon fiber mount AISI 630 steel semi-axles, in line with the skilful combination of materials of the entire Ekar group, in order to obtain lightweight components, but with maximum efficiency and durability.The new ProTech™ technology joins the two half-axles inside the bottom bracket, with a single strong screw. The oversized stainless steel bearing is located on the crank, keyed to the half-axle, for maximum smoothness and strength - and to be easily accessible for inspection and maintenance, without having to d.