Well the bike is a bit big for me, but i will probably grow into and grow out of it in short time. I only have about an inch of clearance. Are you saying the seat should be the same height as the handlebars? or just high enough so my legs are almost fully extended? also what can i do to make the drivetrain (rear) less noisy? should i use the chain tension adjuster screw on the rear derailer? will that help? and why does my rear brake not stop me but merely slow me down? it takes me many feet to stop, and thats not safe.