i’m finding it hard to come up with a worse idea for a cargo bike. A brakeless fixed gear cargo bike with carbon rims… You know what’s going to make it harder for you to stop at the bottom of a hill? CARGO. You know what’s going to make a hill harder to climb? CARGO. There’s a reason cargo bikes come with hydraulic disc brakes and a wide gear ratio. You’re defeating the purpose of a cargo bike with this ridiculous monstrosity and complete waste of time. Cargo bikes are purpose built machines made for larger stresses than the average bike, and while carbon is often considered stronger than other rim materials, it suffers with incarnadines in the longevity of it’s life. Especially if you’re putting excessive stresses on them like you would see with a cargo bike. This is not only an utterly ludicrous idea, but a large danger to anyone around this thing including the rider.