I was thinking a pair of lighter narrower tires would be an easy improvement. It has fat knobbies on it now, and I could easily lose a few pounds just by replacing them. I've had this bike for 15 years and I've been off-road maybe 3 times so no need for them. Maybe I'll carry the chain in with me during the week when I take the subway and leave it by the rack.

Funny thing, my son used that same mtb for a few years, but last year I let him try one of my road bikes. I haven't gotten the road bike back from him yet.