Bike is practically brand new. Bike has only been used about 6 times. The Nakamura Crxssfire B (16") boys' bike comes equipped with tool-less removable training wheels. When your child is ready to try riding a two-wheeler, the training wheels can be easily removed by pressing two buttons and sliding them out from the mount bracket without the use of any tools. If your child is feeling a little less confident simply reverse the procedure and the training wheels are back on until they are ready to try again.This 16” bike is typically for kids between the age of 3 and 6, or 34” to 45” tall.