This 18 space bike rack is made with 1-5/8" O.D. pipe frame and available in two finish options: galvanized steel (shown) and black powder coated. Our Quick Ship Bike Racks can withstand 24/7 outdoor exposure to public use and weather. Features single side bicycle mounting with enough space for 18 bikes. • In stock and ready to ship in 3 business days for a quantity up to 4.