"Comfort, mountain, and road bikes for hourly or daily rental; clipless pedals available; free helmet provided. Sponsors legal-trail mountain bike ride (6.5 mile single-track loop) at 8:30am sharp on Sundays in Cunningham Park!" For the group rides, they ask you arrive no later than 8:15AM at the trail head. Source: Greenopia, (2008). New York City. New York: The Green Media Group.