Join us for the Back Alley Bikes Garage Sale – Used Bike Sale on August 15, 2026, from 12:00 PM to 4:00 PM at Back Alley Bikes, 3611 Cass Ave. (Alley/Rear Entrance), Detroit, MI 48201, United States. Shop affordable used adult bikes priced from $25–$175, all sold as-is. Please note: the entrance is located in the alley behind the building.