A bobber has a lot of resemblance with a chopper. There are a few exceptions though. A bobber has no front fender, and a shortened rear fender. A bobber is by default meant for solo riding, so a pillion seat is missing. They’re lowered and de-chromed. A bobber will most often have a simple colour, sometimes with only a primer base. Ideally a bobber will have a shorter wheel base too.