Bavel Commuter Aluminum Road Bike 21 Speed 700c 27.3LBS Lightweight and Sturdy Aluminum Frame and forkWelding process downhand welding EF-500 shifter and TY-300 derailleur and freewheel Disc Brake Quick-Release Front and Rear Wheels and Prowheel Crank Set Item locationUnited States (Note:The bicycle is assembled manually. In order to guarantee the quality, we have a 500-meter riding test before packaging and shipping .)Crankset Is a Process effect , there is no problem, please lock each screw,