Schwinn Mesa Adult Mountain Bike - 21-24 Speed Gears, 27.5" Wheels, Aluminum Frame (S-XL), Multiple Colors - Perfect for Trail Riding, Commuting & Outdoor Adventures

Bicycle arrived with bent derailleur. I'd blame that on UPS being careless along the way than on component quality. The bent derailleur (A cheap Shimano that you can find right on Amazon for $25 or so) prompted me to buy a good quality Microshift Advent derailleur I saw on more expensive bikes. It turned out to be incompatible with the rear freewheel, so I ended up going on a bit of a shopping spree for compatible *quality* components to replace the entire chain system, AND rear wheel. And guess what. Well worth the money. I did have to get some help from a bike shop in my town to adjust the chains and replace the front crankarms, but now the ride is butter smooth. So, if you have a hard time with assembly, just swallow your pride, and ask for professional assembly help. It does take well-developed skills and sense to be able to assemble a bicycle properly.