I've got a Fuji Crosstown hybrid with grip shifters that I'd like to change over to LX thumb shifters. The LX thumb shifters are of the 6 and 7-speed variety, probably a number of years old, and my Fuji bike has a no-name 7-speed Shimano cassette. The original grip shifters are Tourney.
Would anyone happen to know whether 6 or 7-speed shifters from the 1990s are compatible with a 7-speed cassette from 2005? Apparently the LX thumb shifters have a friction option as well, so if all else fails I could use them that way. Still, I do like indexed shifting, so that would be ideal.