I sold my drop spindles to go for this set-up. My reasoning is wanting the dual-piston, aluminum calipers and rotors that I can change without re-packing bearings or changing wheel seals. I would've had to buy the newer style bearings to use the drop spindles anyway since mine are the old, smaller style. On another note, I'm a broke hot-rodder and these factory-type budget swaps just interest me (hydroboost is another one!).