No. It simply forces the chain onto a different chainring when employed.
My fault for not being clear.
I had meant in usage by someone who knew how to use a derailleur for best performance. Of course that would mean using the chainrings and cogs with minimum crossover potential.
My fault for not being clear.
I had meant in usage by someone who knew how to use a derailleur for best performance. Of course that would mean using the chainrings and cogs with minimum crossover potential.