Originally Posted by hokiefyd

I replaced the Shimano Revoshift grip shifter on my daughter's Specialized Hotrock with an Altus trigger shfiter. She can work that well.



How do these work? Do you push the thumb shifter to downshift (up the cassette or freewheel) and then push the button for upshifts (down the cassette or freewheel)? I guess the button will do one cog at a time, but can you push the thumb shifter all the way from one end to the other at once, or does it ratchet, allowing just one or two cogs at a time?