I think as far as sales you will sell what sells bets. As far as the intent of the message.............I think it will shed a negative view about cyclists in many peoples eyes. Cyclists are already thought of as being rude and/or snobby. The shirts might reinforce that beleif in people.
I agree with Susimi, if your intent is to deliver a positive message...change the wording. If your intent is you bottom line...do as you please. I would not wear one, nor would I walk or cycle with someone wearing one.
YMMV