In times gone by, there were two worth mention.
First there was shimano 600 then dura ace, then came 105 which took the place of 600 though not quite.
Then came ultegra which took the place of dura ace though not quite, where this left dura ace i don't quite know.
Anyway to go with less than 105 would be most pitiful.
Add heresy add nauseam.!!

Steve33.!!!!!