I have a 7 sp cass. on my MTB and grip shifter
that I need to replace. And I would like to
change to a rapid fire type.
(the brake is linear)
All the shifters I see in the Nashbar catalog
are either 8 sp. (Alivio)
or 9 sp (deore, lx, xt, xtr).
can I use any of these or do I need to
find specifically 7 sp. shifter?