Bicycle Specifications Bicycle Weight: 15.2 KG Frame: Aluminum Handlebars: Iron Handlebar Stem: Aluminum Front Hydraulic: Shock-absorbing hydraulic with lock mode Rim: Aluminum Rim Spokes: Iron Tire Size: 1.95x26 Front Derailleur: Shimano Tourney TZ Rear Derailleur: Shimano Tourney TZ Front Shifter: 3-speed Tourney TZ Rear Shifter: 7-speed ATA Clutch: Shimano Tourney TZ Pedals: Aluminum with reflector Brake Lever: Plastic Front Brake: Disc Rear Brake: Disc Manual seat adjustment Manual front wheel adjustment Manual rear wheel adjustment The above are the specifications of the bicycle, in addition to a larger size seat from the same bicycle company. Note that the original bicycle seat is also available.