Road Bike Aluminum Commuter Bike Shimano 21 Speed 700c x 25c Racing Bicyle Sport Life Frame: 6061 Double Butted Aluminum Fork: 700c 1 1/8" Threadless Shifters: Shimano A050 SIS Handlebar Mounted Wheelset: 700c Doubled Walled CNC Machined Sides 21 Speeds to Handle Any Situation