KACL organizes a bike-a-thon to raise money for AIDS research. Frasier plans to just make a financial donation, but is goaded into participating after Julia announces her intention to take part. Daphne suggests that she and Niles also enter the event. Frasier and Niles try to hide the fact that neither of them knows how to ride a bike, and hope that they can figure it out before the bike-a-thon