upper to lower pulley-axle: 55 mm - composite outer plate -
parallelogram with 11s geometry - black anodized forged aluminium upper and lower body - metal-carbon cage - lightened special rubber pulleys - pulley movement with ceramic ball bushings

Ultra-Shift™ aluminum lower and upper body
 Less weight, less friction, shifting precision
 
Ceramic ball bearings
 Friction reduction, maximum smoothness, maximum durability
 
Ultra-Shift™ exclusive geometry parallelogram
 Maximum derailleur stiffness, fast shifting, precision, reduction of possible play