Originally Posted by
surak
Why bother with the Dura-Ace rotor? Even Shimano is going with the XTR rotor over the Dura-Ace in the new 12 spd 9200 groupset. Excel Sports currently have them in stock.
Also if your son isn't heavy, just have him use 140mm.
I recall someone telling me they discontinued the Ultegra and DA rotors all together.