Originally Posted by
Trakhak
True hype. The designed-in imprecision of the Centeron pulley making precise indexing easy to achieve and maintain was probably the main reason Shimano was able to obliterate the competition so staggeringly rapidly, despite missteps like BioPace.
You can get
exceedingly precise index shifting without using a "Centeron" pulley. Maybe even more precise than with it.
Ask me how I know.