DIY Cargo Bikes Home › Forums › Cargo Bikes › DIY Cargo Bikes Tagged: cargo bike, DIY, welding This topic contains 0 replies, has 1 voice, and was last updated by rollingreenhills 1 year ago. Viewing 1 post (of 1 total) Author Posts 15th October 2018 at 9:37 pm #99 rollingreenhillsKeymaster The cheapest cargo bike frame I know of is £500. For that you can buy a welder and steel, and convert an existing bike to a cargo bike. This topic was modified 1 year ago by rollingreenhills. This topic was modified 1 year ago by rollingreenhills. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.