When you find yourself saying "no I am just going to a short ride today - oh about 25 miles"

When the golf clubs that were so carefully purchased haven't made it out of the storage shed all season.

when you think " I must ride against this 25 mph wind because wind makes me strong!"

this one truly shows you are on the dark side
You send in the wedding RSVP card 2 months prior then find out there is a great little tour that day so you send a cheque and your regrets a week before the wedding ( hey at least enough time to give the caterer a final count)