Quote:
Originally Posted by shovelhd
Shimano really messed with their numbering system. The "xx70" used to mean Di2. 9000 was mechanical, 9070 was Di2. 6800 was mechanical, 6870 was Di2. Now it's all messed up. 9170 is both mechanical and Di2. For individual components like the STI's, 9170 is the hydraulic, 9150 is the rim brake. With Ultegra Di2 coming, I bet they keep the same system. I'm going to need a database to sort it all out.
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R9100 - mechanical shifting, rim caliper
R9120 levers - mechanical shifting, hydro
R9150 - di2, rim
R9170 levers, calipers, wheels - di2, hydro, disc wheels
They went to YXX50 with XTR di2.