When you create your account you have can create a username which is used in the URL, bunchrides.com/profile/fast-rider.
The next step is adding your first name and last name which is used for your friends and other riders to find you under the "Riders" tab.
If you want your username and contact name not to be displayed to the public, simply go to the privacy section of profile settings/privacy and tick "private" under "Who can view my profile" and Bunchrides will issue a randomly generated user name, ie UserAASDEF.
Once the Bunchrides system has created this randomly generated name, you will need to let your friends know this randomly generated name.
Bunchrides displays the riders name for easy identification to other team members and those participating on group rides.