Good luck with your interview.

I am now two weeks into a new position and three months past 65. Okay, it isn't bike-related so the skill set required is different, but the interview process was probably similar. (And I really really wanted a new position.) Be focused. Answer questions accurately and with enthusiasm. Above all else, demonstrate competence, or at least lead them to believe you are competent. Good employers considering a senior person aren't looking for youthful enthusiasm, they are looking for your experience and competence. Show the maturity that you are willing to admit when you don't know something and that you are capable of learning it.

Good luck! Be grateful that a position is available.