Chevy is a very nice looking boy please reconsider running him with a bike since his growth plates in his joints are not yet closed they close around 14-18 months. A pup should not have any forced exercise by forced meaning he/she cannot stop and start at will and rest when they want too like playing in the yard they can run and stop at will. When on a leash they always want to keep up with their humans so the human needs to make the rules.Good Luck with your boy.