The Outlook 6061 T6 special alloy, which is alloyed with magnesium and silicon, is an excellent choice when welding is required, as is the case with bicycle frames. It provides stiffness, structural strength and toughness, good corrosion resistance and good machining characteristics. 

21 speeds! Front shock and fender and rack mounts. Loaded with extras such as shown with rear rack and removable bag, front bag, front and rear light, water bottle holder, kickstand, two sided pedals with step in locks on one side and flat on the other, Cat eye computer and misc breakdown parts, spare tube and tools. Bike purchased in 2014 and has had little use so it looks brand new. Had mountain/gravel bike moderate tread tires but swapted them out for new, smoother road tires. Put a really comfortable padded seat on the bike initially and this shows a little wear but the padding is still excellent. Good for mountain biking, gravel and trail riding. 20" large frame and with 16" tires. Very sharp looking and no scratches or blemishes.