Diy Cargo Carrier Bike Rack . I needed to fabricate a bike rack to fit on the outside of my cargo carrier. The main part of the rack is a plastic crate, i had this one laying around. Universal 2426" Bicycle DIY Rear Carrier Luggage Pannier Racks W from www.ebay.com By pako_s23 in outside bikes. Drill two holes at each end of the board, and two in the center of the board. Cut a 5/4 deck board to fit the length of the cargo carrier.