This is a 21 gear, aluminum frame Ascente Aggressor. Shimano Deore DX brakes, cantilever (centre-pull) style. I haven't had it tuned recently but the tires are inflated and it cycles through all its gears. The top tube of the frame stands at just over 30"; the frame size (measured by the seat tube) is 20.5". $140 obo. Think you want it, come test it out.