Bicycle drawing

on the bicycle drawing, I had trouble with making it look like metal which was very important. I enjoyed outlining the bike a lot more than I enjoyed shading it. I attempted to add more darks and lights where I saw it on the actual bike and it actually slowly started to look more realistic and not just like a colored in bike. the more I draw pictures with shading with different graphite pencils the better I will get at it looking more realistic.