Hi all,
have tried to dig some for an answer on this but just can’t get a solid answer.

the short of it:
Purchased an older Murray mountain bike from 1984ish.. Brand new, never used and was stored in basement for last 30+ years. Tires are in great shape and have been flawless. Have ridden it about 180 miles so far. Bike has 26x2.125 tires on it.

I would like a thinner tire but am really not sure what would fit on the rim. I don’t want super thin but maybe a touch under 2” and a less knobby tire.

what sizes
would fit
this rim.