CassidyAce
Senior Retro Guru
My 1998 RockHopper and 1996 Stumpies take 73mm BBs. The 1994 and 1996 HardRocks I have both take 68mm.Great job - finished the build really nicely - congratulations! Enjoy it.
I seem to remember reading somewhere on here that some years rockhoppers did take 73 mm bottom brackets. Possibly also stumpies. My hardrock is the same as the OPs and takes 68mm.