The most evident changes are immediately noticed on the first shift. The new design of the chain up shift & downshift zones makes shifting extremely fast & precise. The axle of Athena (TM) is the brand new Power Torque System (TM), which makes it possible to obtain very high values of torsional stiffness & efficient power transmission, without increasing the lateral bulk. The crankset is also available in the carbon fibre version that is more than 100 grams lighter. forged aluminium cranks light alloy fixing bolts & nuts light alloy chainrings chainrings with Xpss (tm) (e Xtreme Performance Shifting System) chainrings with silver anodization 8 pins on the large chainring integrated Power-torque (tm) axle requires Powertorque (tm) Bb cups Weight: 736 g