I am talking about bike frame. Recently one of my friends left the country and gave me his 2001 GT Aggressor 3.0. The bike is not used very much and the frame is in really good shape. he fine tuned the bike more for urban commuting and light trail riding (more like traveling). it has slicks, narrow tires/wheels, light front shocks etc.

the problem is I am 5'10" and the frame is 21" i guess, which is a little too big for me. I have a K2 zed 4.0 (19" frame) for my regular trail riding. if anything, this bike would be used for urban commute and site seeing, nothing aggressive. Now, Would I be able to use this bike for type of riding I mentioned (without hurting myself)?

or is it better to sale it? How much does it worth? Please help me. Following is the specification:

Frame: 7000 series butted aluminium with replacable derailluer hanger
Fork: Mozo with 63mm travel
Frond Der: Shimano Acera
Rear Der: Shimano Alivio
Shifter: SRAM grip shifter (3X7, 21 speed)
Cranks: Shimano
Wheels: Alex Y 2000
Brakes: Tektro V-brakes
Handel Bar: Truvativ
Headset: threaded


Your help would be much appreciated. thanks.