Custom Bike Specifications for Paris Brest Paris Brevet

The speaker discusses their custom Mariposa bike specially made for the Paris Brest Paris Brevet (PBP) endurance event, highlighting its specifications including a steel frame, Princeton Carbon Works wheels, a dynamo hub, envy cockpit handlebars, thorn saddle, and a Dura Ace D2 drivetrain. They emphasize the importance of a lightweight and comfortable bike, incorporating features such as a carbon fork, hub-generated lighting system, and removable fenders, concluding with their excitement and positive reception of the bike.