Front: Shimano Dura Ace HB-7900 hub laced 3 cross to tubular Mavic GP4 rim with double butted spokes 2.0-1.8-2.0, 32 hole, presta valve, 100 OLD. Rear: Shimano Dura Ace 8 speed SIS freehub laced 3 cross to tubular Mavic Reflex rim with double butted spokes 2.0-1.8-2.0, 32 hole, presta valve, 130 OLD.