Aluminum frame Bike type: City Wheel size: 28" Color: black Number of gears: 27 gears (Shimano XT gear shift) Installed new parts: 2 shift cables, 2 brake pads, and saddle. Brakes: Hydraulic disc brake (Shimano XT) Gear shift: 2 grip shift (Shimano XT) Equipment: Suspension fork (NCX-E-AL-Lite). Condition: The bike is in a nice and well-maintained condition - freshly serviced.