This shimano rx31 700c centre lock disc front wheel offering all the technology of shimano wheels at an economical price the 24 mm high profile aluminium rim for improved aero dynamics with 24 stainless steel butted and bladed straight pull spokes with a 2 cross lacing pattern improve lateral and torsional power transmission rigidity the hub uses angular contact bearings designed to cradle the balls giving both radial and lateral support for superior strength and durability in real world ri