Originally Posted by
mtnbk3000
i thought that 7/8 were the same i didn't realize that 6 was also
Specific 6-speed chains are obsolete. Currently 7/8-speed chains can be used on 8-speed and lower (5,6 and 7) drivetrains. 9 and 10-speed drivetrains require their specific chain but each can be used with fewer cogs if necessary.