Lightweight Aluminium Frame with cruising slick tires. 15.5 Inch Frame (ie for someone in the 5 foot range). Some higher end components from another bike were added a few years back including Mavic Rims and SPD pedals (with removable platforms). Shifts ok but the shocks are pretty much useless at this point though it handles fine). Could use a little work to get her back into shape but overall a solid, lightweight ride. The back rack has been removed but could be included if you like.