Invite your Buddies and Win! #BringABuddy 1. Invite a new rider to try BMX. When they sign up for their BMX membership, they will receive a Serial Number. 2. Add your Buddy to your profile. Log into your BMX account and enter your Buddy’s Serial Number to register them as your recruit. 3. Your Buddy confirms you invited them. The new rider must verify that you were the one who introduced them to BMX. 4. Your Buddy races five times. Once your Buddy completes five races, they officially count toward your Bring-A-Buddy total. #usabmx #bmx