Originally Posted by
Leinster
105 is older than Ultegra or Alivia, though. When 105 was introduced, Ultegra was still called 600.
The other groups around then were Exage (which came in 300EX, 400EX and 500EX levels) and, for a while, RX100.
None of it made sense.
Wow! I used to have a Shimano 600 rear derailleur - didn't realise it was one of the better ones. I also had a Shimano Titlist front derailleur which replace the Simplex one I had before that.